From patchwork Thu Aug 29 00:45:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Marek Vasut X-Patchwork-Id: 824385 Received: from phobos.denx.de (phobos.denx.de [85.214.62.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B6975DDC5; Thu, 29 Aug 2024 00:45:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=85.214.62.61 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724892344; cv=none; b=CRfUSKbcHSL9LkywqbaKVhr/h0kf5wt4QH8zaey4xqo19LeQ+v7qc67U0Uq+9u6skOAtp7FBYV2a/iBlXg+juxd07syCZkKiS26fjIWMX/XQwSebHR5MredWI5p828hYEHKON/4QH/jdJVWD3QqxlBQwCPdp7EEAJp4/BSF+8X8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724892344; c=relaxed/simple; bh=dWc0daWfC0f8Pye4KGMNAHBszE7mp7o38Z2FthrY03A=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=KjIQkX2lWVsIqqWVS441ihzUncxlUmZdusRhB2CAztDFxBk56EFzPzogBGLwNnXMfvtWavJEN/w7K6MQm1nxrzby30HVcx5ckiosm6ZasEyzQcd7q8aoW212z1YtgcoR8QKafRtKFdcYoQdcvS+hhAOf4bEvyEEcPMJ4OozLC58= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=denx.de; spf=pass smtp.mailfrom=denx.de; dkim=pass (2048-bit key) header.d=denx.de header.i=@denx.de header.b=RPmFxY8y; arc=none smtp.client-ip=85.214.62.61 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=denx.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=denx.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=denx.de header.i=@denx.de header.b="RPmFxY8y" Received: from tr.lan (ip-86-49-120-218.bb.vodafone.cz [86.49.120.218]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: marex@denx.de) by phobos.denx.de (Postfix) with ESMTPSA id 9FE2C88A2E; Thu, 29 Aug 2024 02:45:39 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=denx.de; s=phobos-20191101; t=1724892340; bh=D5GYHDC3hE4vSuNuqmHmjjcpipnv+6bjNL4d28Kh3Fs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RPmFxY8y+MZhNuVl0W4en1b1IndjQQW42jzDk9nfog8fEDwwCMVeffZN9r7DX/i+m BuU7PHFOe6yvBfak2HYwKdfpdbx0KCRSKPsWF8vc+C3eelkfW5wjh3nyaL7dmRqhJB HYw+4d7Dqb1+i+3AMlnpJejdJLHSG3SA6MTV84HFfN+sZ3Ohth6t/VgD5xYIFEAUGh adOtgtrtv3EcmyfT2nHfP/jlrV5OoDBE18chOSZ/reamD+oiEIIFlS6+nix23mMY82 sthNnmtCFTo+vcHdlK2a0F+FEc4G2P4mqNN0jxSB7KuY728NMW4Wy9IxsQPGuPWxBO 3WluEB93XzLzQ== From: Marek Vasut To: linux-wireless@vger.kernel.org Cc: Marek Vasut , =?utf-8?q?Alexis_Lothor=C3=A9?= , "David S. Miller" , Adham Abozaeid , Ajay Singh , Claudiu Beznea , Conor Dooley , Eric Dumazet , Jakub Kicinski , Kalle Valo , Krzysztof Kozlowski , Paolo Abeni , Rob Herring , devicetree@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH v4 4/5] wifi: wilc1000: Fill in missing error handling Date: Thu, 29 Aug 2024 02:45:02 +0200 Message-ID: <20240829004510.178016-4-marex@denx.de> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240829004510.178016-1-marex@denx.de> References: <20240829004510.178016-1-marex@denx.de> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 0.103.8 at phobos.denx.de X-Virus-Status: Clean Add error handling to chip_wakeup() and propagate the errors throughout the entire driver. Add error handling to acquire_bus()/release_bus() and host_sleep_notify()/host_wakeup_notify() functions as a result as well. Fill the error handling to all call sites. Reviewed-by: Alexis LothorĂ© Signed-off-by: Marek Vasut --- Cc: "David S. Miller" Cc: Adham Abozaeid Cc: Ajay Singh Cc: Alexis LothorĂ© Cc: Claudiu Beznea Cc: Conor Dooley Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Kalle Valo Cc: Krzysztof Kozlowski Cc: Marek Vasut Cc: Paolo Abeni Cc: Rob Herring Cc: devicetree@vger.kernel.org Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org --- V3: New patch V4: No change V4: Add RB from Alexis --- .../net/wireless/microchip/wilc1000/sdio.c | 11 +- .../net/wireless/microchip/wilc1000/wlan.c | 154 +++++++++++++----- .../net/wireless/microchip/wilc1000/wlan.h | 4 +- 3 files changed, 118 insertions(+), 51 deletions(-) diff --git a/drivers/net/wireless/microchip/wilc1000/sdio.c b/drivers/net/wireless/microchip/wilc1000/sdio.c index 90357c89ae29b..c26447289b71b 100644 --- a/drivers/net/wireless/microchip/wilc1000/sdio.c +++ b/drivers/net/wireless/microchip/wilc1000/sdio.c @@ -960,6 +960,7 @@ static int wilc_sdio_suspend(struct device *dev) { struct sdio_func *func = dev_to_sdio_func(dev); struct wilc *wilc = sdio_get_drvdata(func); + int ret; dev_info(dev, "sdio suspend\n"); @@ -969,7 +970,11 @@ static int wilc_sdio_suspend(struct device *dev) if (!IS_ERR(wilc->rtc_clk)) clk_disable_unprepare(wilc->rtc_clk); - host_sleep_notify(wilc); + ret = host_sleep_notify(wilc); + if (ret) { + clk_prepare_enable(wilc->rtc_clk); + return ret; + } wilc_sdio_disable_interrupt(wilc); @@ -992,9 +997,7 @@ static int wilc_sdio_resume(struct device *dev) wilc_sdio_init(wilc, true); wilc_sdio_enable_interrupt(wilc); - host_wakeup_notify(wilc); - - return 0; + return host_wakeup_notify(wilc); } static const struct of_device_id wilc_of_match[] = { diff --git a/drivers/net/wireless/microchip/wilc1000/wlan.c b/drivers/net/wireless/microchip/wilc1000/wlan.c index d228c5df82628..01476f8ecc36f 100644 --- a/drivers/net/wireless/microchip/wilc1000/wlan.c +++ b/drivers/net/wireless/microchip/wilc1000/wlan.c @@ -601,7 +601,7 @@ static int chip_allow_sleep(struct wilc *wilc) return 0; } -static void chip_wakeup(struct wilc *wilc) +static int chip_wakeup(struct wilc *wilc) { u32 ret = 0; u32 clk_status_val = 0, trials = 0; @@ -630,20 +630,20 @@ static void chip_wakeup(struct wilc *wilc) ret = hif_func->hif_write_reg(wilc, from_host_to_fw_reg, from_host_to_fw_bit); if (ret) - return; + return ret; /* Set wake-up bit */ ret = hif_func->hif_write_reg(wilc, wakeup_reg, wakeup_bit); if (ret) - return; + return ret; while (trials < WAKE_UP_TRIAL_RETRY) { ret = hif_func->hif_read_reg(wilc, clk_status_reg, &clk_status_val); if (ret) { pr_err("Bus error %d %x\n", ret, clk_status_val); - return; + return ret; } if (clk_status_val & clk_status_bit) break; @@ -652,42 +652,63 @@ static void chip_wakeup(struct wilc *wilc) } if (trials >= WAKE_UP_TRIAL_RETRY) { pr_err("Failed to wake-up the chip\n"); - return; + return -ETIMEDOUT; } /* Sometimes spi fail to read clock regs after reading * writing clockless registers */ if (wilc->io_type == WILC_HIF_SPI) wilc->hif_func->hif_reset(wilc); + + return 0; } -static inline void acquire_bus(struct wilc *wilc, enum bus_acquire acquire) +static inline int acquire_bus(struct wilc *wilc, enum bus_acquire acquire) { + int ret = 0; + mutex_lock(&wilc->hif_cs); - if (acquire == WILC_BUS_ACQUIRE_AND_WAKEUP && wilc->power_save_mode) - chip_wakeup(wilc); + if (acquire == WILC_BUS_ACQUIRE_AND_WAKEUP && wilc->power_save_mode) { + ret = chip_wakeup(wilc); + if (ret) + mutex_unlock(&wilc->hif_cs); + } + + return ret; } -static inline void release_bus(struct wilc *wilc, enum bus_release release) +static inline int release_bus(struct wilc *wilc, enum bus_release release) { + int ret = 0; + if (release == WILC_BUS_RELEASE_ALLOW_SLEEP && wilc->power_save_mode) - chip_allow_sleep(wilc); + ret = chip_allow_sleep(wilc); mutex_unlock(&wilc->hif_cs); + + return ret; } -void host_wakeup_notify(struct wilc *wilc) +int host_wakeup_notify(struct wilc *wilc) { - acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP); + int ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP); + + if (ret) + return ret; + wilc->hif_func->hif_write_reg(wilc, WILC_CORTUS_INTERRUPT_2, 1); - release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); + return release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); } EXPORT_SYMBOL_GPL(host_wakeup_notify); -void host_sleep_notify(struct wilc *wilc) +int host_sleep_notify(struct wilc *wilc) { - acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP); + int ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP); + + if (ret) + return ret; + wilc->hif_func->hif_write_reg(wilc, WILC_CORTUS_INTERRUPT_1, 1); - release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); + return release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); } EXPORT_SYMBOL_GPL(host_sleep_notify); @@ -714,6 +735,7 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count) int srcu_idx; u8 *txb = wilc->tx_buffer; struct wilc_vif *vif; + int rv; if (wilc->quit) goto out_update_cnt; @@ -784,7 +806,10 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count) goto out_unlock; vmm_table[i] = 0x0; - acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP); + ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP); + if (ret) + goto out_unlock; + counter = 0; func = wilc->hif_func; do { @@ -859,7 +884,9 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count) goto out_release_bus; } - release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); + ret = release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); + if (ret) + goto out_unlock; offset = 0; i = 0; @@ -921,7 +948,9 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count) for (i = 0; i < NQUEUES; i++) wilc->txq[i].fw.count += ac_pkt_num_to_chip[i]; - acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP); + ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP); + if (ret) + goto out_unlock; ret = func->hif_clear_int_ext(wilc, ENABLE_TX_VMM); if (ret) @@ -930,7 +959,9 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count) ret = func->hif_block_tx_ext(wilc, 0, txb, offset); out_release_bus: - release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); + rv = release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); + if (!ret && rv) + ret = rv; out_unlock: mutex_unlock(&wilc->txq_add_to_head_cs); @@ -1059,8 +1090,14 @@ static void wilc_wlan_handle_isr_ext(struct wilc *wilc, u32 int_status) void wilc_handle_isr(struct wilc *wilc) { u32 int_status; + int ret; + + ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP); + if (ret) { + dev_err_ratelimited(wilc->dev, "Cannot acquire bus\n"); + return; + } - acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP); wilc->hif_func->hif_read_int(wilc, &int_status); if (int_status & DATA_INT_EXT) @@ -1069,7 +1106,9 @@ void wilc_handle_isr(struct wilc *wilc) if (!(int_status & (ALL_INT_EXT))) wilc_unknown_isr_ext(wilc); - release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); + ret = release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); + if (ret) + dev_err_ratelimited(wilc->dev, "Cannot release bus\n"); } EXPORT_SYMBOL_GPL(wilc_handle_isr); @@ -1081,6 +1120,7 @@ int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer, u8 *dma_buffer; int ret = 0; u32 reg = 0; + int rv; blksz = BIT(12); @@ -1091,7 +1131,9 @@ int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer, offset = 0; pr_debug("%s: Downloading firmware size = %d\n", __func__, buffer_size); - acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP); + ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP); + if (ret) + return ret; wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, ®); reg &= ~BIT(10); @@ -1100,11 +1142,17 @@ int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer, if (reg & BIT(10)) pr_err("%s: Failed to reset\n", __func__); - release_bus(wilc, WILC_BUS_RELEASE_ONLY); + ret = release_bus(wilc, WILC_BUS_RELEASE_ONLY); + if (ret) + goto fail; + do { addr = get_unaligned_le32(&buffer[offset]); size = get_unaligned_le32(&buffer[offset + 4]); - acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP); + ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP); + if (ret) + goto fail; + offset += 8; while (((int)size) && (offset < buffer_size)) { if (size <= blksz) @@ -1122,7 +1170,9 @@ int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer, offset += size2; size -= size2; } - release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); + rv = release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); + if (!ret && rv) + ret = rv; if (ret) { pr_err("%s Bus error\n", __func__); @@ -1141,7 +1191,7 @@ int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer, int wilc_wlan_start(struct wilc *wilc) { u32 reg = 0; - int ret; + int ret, rv; u32 chipid; if (wilc->io_type == WILC_HIF_SDIO) { @@ -1150,7 +1200,10 @@ int wilc_wlan_start(struct wilc *wilc) } else if (wilc->io_type == WILC_HIF_SPI) { reg = 1; } - acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY); + ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY); + if (ret) + return ret; + ret = wilc->hif_func->hif_write_reg(wilc, WILC_VMM_CORE_CFG, reg); if (ret) goto release; @@ -1181,16 +1234,18 @@ int wilc_wlan_start(struct wilc *wilc) wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, ®); release: - release_bus(wilc, WILC_BUS_RELEASE_ONLY); - return ret; + rv = release_bus(wilc, WILC_BUS_RELEASE_ONLY); + return ret ? ret : rv; } int wilc_wlan_stop(struct wilc *wilc, struct wilc_vif *vif) { u32 reg = 0; - int ret; + int ret, rv; - acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP); + ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP); + if (ret) + return ret; ret = wilc->hif_func->hif_read_reg(wilc, GLOBAL_MODE_CONTROL, ®); if (ret) @@ -1226,9 +1281,9 @@ int wilc_wlan_stop(struct wilc *wilc, struct wilc_vif *vif) ret = 0; release: /* host comm is disabled - we can't issue sleep command anymore: */ - release_bus(wilc, WILC_BUS_RELEASE_ONLY); + rv = release_bus(wilc, WILC_BUS_RELEASE_ONLY); - return ret; + return ret ? ret : rv; } void wilc_wlan_cleanup(struct net_device *dev) @@ -1433,11 +1488,13 @@ static int wilc_get_chipid(struct wilc *wilc) static int init_chip(struct net_device *dev) { u32 reg; - int ret = 0; + int ret, rv; struct wilc_vif *vif = netdev_priv(dev); struct wilc *wilc = vif->wilc; - acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP); + ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP); + if (ret) + return ret; ret = wilc_get_chipid(wilc); if (ret) @@ -1469,17 +1526,19 @@ static int init_chip(struct net_device *dev) } release: - release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); + rv = release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); - return ret; + return ret ? ret : rv; } int wilc_load_mac_from_nv(struct wilc *wl) { - int ret = -EINVAL; + int ret, rv; unsigned int i; - acquire_bus(wl, WILC_BUS_ACQUIRE_AND_WAKEUP); + ret = acquire_bus(wl, WILC_BUS_ACQUIRE_AND_WAKEUP); + if (ret) + return ret; for (i = 0; i < WILC_NVMEM_MAX_NUM_BANK; i++) { int bank_offset = get_bank_offset_from_bank_index(i); @@ -1518,14 +1577,14 @@ int wilc_load_mac_from_nv(struct wilc *wl) break; } - release_bus(wl, WILC_BUS_RELEASE_ALLOW_SLEEP); - return ret; + rv = release_bus(wl, WILC_BUS_RELEASE_ALLOW_SLEEP); + return ret ? ret : rv; } EXPORT_SYMBOL_GPL(wilc_load_mac_from_nv); int wilc_wlan_init(struct net_device *dev) { - int ret = 0; + int ret = 0, rv; struct wilc_vif *vif = netdev_priv(dev); struct wilc *wilc; @@ -1534,11 +1593,16 @@ int wilc_wlan_init(struct net_device *dev) wilc->quit = 0; if (!wilc->hif_func->hif_is_init(wilc)) { - acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY); + ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY); + if (ret) + return ret; + ret = wilc->hif_func->hif_init(wilc, false); if (!ret) ret = wilc_get_chipid(wilc); - release_bus(wilc, WILC_BUS_RELEASE_ONLY); + rv = release_bus(wilc, WILC_BUS_RELEASE_ONLY); + if (!ret && rv) + ret = rv; if (ret) goto fail; diff --git a/drivers/net/wireless/microchip/wilc1000/wlan.h b/drivers/net/wireless/microchip/wilc1000/wlan.h index e75a5c8aaecec..4e2b0c4ac1e21 100644 --- a/drivers/net/wireless/microchip/wilc1000/wlan.h +++ b/drivers/net/wireless/microchip/wilc1000/wlan.h @@ -436,8 +436,8 @@ netdev_tx_t wilc_mac_xmit(struct sk_buff *skb, struct net_device *dev); void wilc_wfi_p2p_rx(struct wilc_vif *vif, u8 *buff, u32 size); bool wilc_wfi_mgmt_frame_rx(struct wilc_vif *vif, u8 *buff, u32 size); -void host_wakeup_notify(struct wilc *wilc); -void host_sleep_notify(struct wilc *wilc); +int host_wakeup_notify(struct wilc *wilc); +int host_sleep_notify(struct wilc *wilc); int wilc_send_config_pkt(struct wilc_vif *vif, u8 mode, struct wid *wids, u32 count); int wilc_wlan_init(struct net_device *dev);