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[109.49.46.234]) by smtp.gmail.com with ESMTPSA id j7sm23042980wmi.21.2021.05.11.01.51.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 May 2021 01:51:07 -0700 (PDT) From: Rui Miguel Silva To: Greg Kroah-Hartman , Sebastian Siewior , Laurent Pinchart , Rob Herring Cc: linux-usb@vger.kernel.org, devicetree@vger.kernel.org, Rui Miguel Silva Subject: [PATCH v2 1/9] usb: isp1760: fix strict typechecking Date: Tue, 11 May 2021 09:50:53 +0100 Message-Id: <20210511085101.2081399-2-rui.silva@linaro.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210511085101.2081399-1-rui.silva@linaro.org> References: <20210511085101.2081399-1-rui.silva@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org There are a lot of pre-existing typechecking warnings around the access and assign of elements of ptd structure of __dw type. sparse: warning: invalid assignment: |= sparse: left side has type restricted __dw sparse: right side has type unsigned int or warning: restricted __dw degrades to integer or sparse: warning: incorrect type in assignment (different base types) sparse: expected restricted __dw [usertype] dw4 sparse: got unsigned int [assigned] [usertype] usof To handle this, annotate conversions along the {TO,FROM}_DW* macros and some assignments and function arguments. This clean up completely all sparse warnings for this driver. Signed-off-by: Rui Miguel Silva --- drivers/usb/isp1760/isp1760-hcd.c | 92 ++++++++++++++++--------------- 1 file changed, 47 insertions(+), 45 deletions(-) diff --git a/drivers/usb/isp1760/isp1760-hcd.c b/drivers/usb/isp1760/isp1760-hcd.c index 33ae656c4b68..0e0a4b01c710 100644 --- a/drivers/usb/isp1760/isp1760-hcd.c +++ b/drivers/usb/isp1760/isp1760-hcd.c @@ -66,44 +66,46 @@ struct ptd { #define ATL_PTD_OFFSET 0x0c00 #define PAYLOAD_OFFSET 0x1000 - -/* ATL */ -/* DW0 */ -#define DW0_VALID_BIT 1 -#define FROM_DW0_VALID(x) ((x) & 0x01) -#define TO_DW0_LENGTH(x) (((u32) x) << 3) -#define TO_DW0_MAXPACKET(x) (((u32) x) << 18) -#define TO_DW0_MULTI(x) (((u32) x) << 29) -#define TO_DW0_ENDPOINT(x) (((u32) x) << 31) +#define TO_DW(x) ((__force __dw)x) +#define TO_U32(x) ((__force u32)x) + + /* ATL */ + /* DW0 */ +#define DW0_VALID_BIT TO_DW(1) +#define FROM_DW0_VALID(x) (TO_U32(x) & 0x01) +#define TO_DW0_LENGTH(x) TO_DW((((u32)x) << 3)) +#define TO_DW0_MAXPACKET(x) TO_DW((((u32)x) << 18)) +#define TO_DW0_MULTI(x) TO_DW((((u32)x) << 29)) +#define TO_DW0_ENDPOINT(x) TO_DW((((u32)x) << 31)) /* DW1 */ -#define TO_DW1_DEVICE_ADDR(x) (((u32) x) << 3) -#define TO_DW1_PID_TOKEN(x) (((u32) x) << 10) -#define DW1_TRANS_BULK ((u32) 2 << 12) -#define DW1_TRANS_INT ((u32) 3 << 12) -#define DW1_TRANS_SPLIT ((u32) 1 << 14) -#define DW1_SE_USB_LOSPEED ((u32) 2 << 16) -#define TO_DW1_PORT_NUM(x) (((u32) x) << 18) -#define TO_DW1_HUB_NUM(x) (((u32) x) << 25) +#define TO_DW1_DEVICE_ADDR(x) TO_DW((((u32)x) << 3)) +#define TO_DW1_PID_TOKEN(x) TO_DW((((u32)x) << 10)) +#define DW1_TRANS_BULK TO_DW(((u32)2 << 12)) +#define DW1_TRANS_INT TO_DW(((u32)3 << 12)) +#define DW1_TRANS_SPLIT TO_DW(((u32)1 << 14)) +#define DW1_SE_USB_LOSPEED TO_DW(((u32)2 << 16)) +#define TO_DW1_PORT_NUM(x) TO_DW((((u32)x) << 18)) +#define TO_DW1_HUB_NUM(x) TO_DW((((u32)x) << 25)) /* DW2 */ -#define TO_DW2_DATA_START_ADDR(x) (((u32) x) << 8) -#define TO_DW2_RL(x) ((x) << 25) -#define FROM_DW2_RL(x) (((x) >> 25) & 0xf) +#define TO_DW2_DATA_START_ADDR(x) TO_DW((((u32)x) << 8)) +#define TO_DW2_RL(x) TO_DW(((x) << 25)) +#define FROM_DW2_RL(x) ((TO_U32(x) >> 25) & 0xf) /* DW3 */ -#define FROM_DW3_NRBYTESTRANSFERRED(x) ((x) & 0x7fff) -#define FROM_DW3_SCS_NRBYTESTRANSFERRED(x) ((x) & 0x07ff) -#define TO_DW3_NAKCOUNT(x) ((x) << 19) -#define FROM_DW3_NAKCOUNT(x) (((x) >> 19) & 0xf) -#define TO_DW3_CERR(x) ((x) << 23) -#define FROM_DW3_CERR(x) (((x) >> 23) & 0x3) -#define TO_DW3_DATA_TOGGLE(x) ((x) << 25) -#define FROM_DW3_DATA_TOGGLE(x) (((x) >> 25) & 0x1) -#define TO_DW3_PING(x) ((x) << 26) -#define FROM_DW3_PING(x) (((x) >> 26) & 0x1) -#define DW3_ERROR_BIT (1 << 28) -#define DW3_BABBLE_BIT (1 << 29) -#define DW3_HALT_BIT (1 << 30) -#define DW3_ACTIVE_BIT (1 << 31) -#define FROM_DW3_ACTIVE(x) (((x) >> 31) & 0x01) +#define FROM_DW3_NRBYTESTRANSFERRED(x) TO_U32((x) & 0x7fff) +#define FROM_DW3_SCS_NRBYTESTRANSFERRED(x) TO_U32((x) & 0x07ff) +#define TO_DW3_NAKCOUNT(x) TO_DW(((x) << 19)) +#define FROM_DW3_NAKCOUNT(x) ((TO_U32(x) >> 19) & 0xf) +#define TO_DW3_CERR(x) TO_DW(((x) << 23)) +#define FROM_DW3_CERR(x) ((TO_U32(x) >> 23) & 0x3) +#define TO_DW3_DATA_TOGGLE(x) TO_DW(((x) << 25)) +#define FROM_DW3_DATA_TOGGLE(x) ((TO_U32(x) >> 25) & 0x1) +#define TO_DW3_PING(x) TO_DW(((x) << 26)) +#define FROM_DW3_PING(x) ((TO_U32(x) >> 26) & 0x1) +#define DW3_ERROR_BIT TO_DW((1 << 28)) +#define DW3_BABBLE_BIT TO_DW((1 << 29)) +#define DW3_HALT_BIT TO_DW((1 << 30)) +#define DW3_ACTIVE_BIT TO_DW((1 << 31)) +#define FROM_DW3_ACTIVE(x) ((TO_U32(x) >> 31) & 0x01) #define INT_UNDERRUN (1 << 2) #define INT_BABBLE (1 << 1) @@ -292,12 +294,12 @@ static void ptd_write(void __iomem *base, u32 ptd_offset, u32 slot, struct ptd *ptd) { mem_writes8(base, ptd_offset + slot*sizeof(*ptd) + sizeof(ptd->dw0), - &ptd->dw1, 7*sizeof(ptd->dw1)); + (__force u32 *)&ptd->dw1, 7 * sizeof(ptd->dw1)); /* Make sure dw0 gets written last (after other dw's and after payload) since it contains the enable bit */ wmb(); - mem_writes8(base, ptd_offset + slot*sizeof(*ptd), &ptd->dw0, - sizeof(ptd->dw0)); + mem_writes8(base, ptd_offset + slot * sizeof(*ptd), + (__force u32 *)&ptd->dw0, sizeof(ptd->dw0)); } @@ -553,7 +555,7 @@ static void create_ptd_atl(struct isp1760_qh *qh, ptd->dw0 |= TO_DW0_ENDPOINT(usb_pipeendpoint(qtd->urb->pipe)); /* DW1 */ - ptd->dw1 = usb_pipeendpoint(qtd->urb->pipe) >> 1; + ptd->dw1 = TO_DW((usb_pipeendpoint(qtd->urb->pipe) >> 1)); ptd->dw1 |= TO_DW1_DEVICE_ADDR(usb_pipedevice(qtd->urb->pipe)); ptd->dw1 |= TO_DW1_PID_TOKEN(qtd->packet_type); @@ -575,7 +577,7 @@ static void create_ptd_atl(struct isp1760_qh *qh, /* SE bit for Split INT transfers */ if (usb_pipeint(qtd->urb->pipe) && (qtd->urb->dev->speed == USB_SPEED_LOW)) - ptd->dw1 |= 2 << 16; + ptd->dw1 |= DW1_SE_USB_LOSPEED; rl = 0; nak = 0; @@ -647,14 +649,14 @@ static void transform_add_int(struct isp1760_qh *qh, * that number come from? 0xff seems to work fine... */ /* ptd->dw5 = 0x1c; */ - ptd->dw5 = 0xff; /* Execute Complete Split on any uFrame */ + ptd->dw5 = TO_DW(0xff); /* Execute Complete Split on any uFrame */ } period = period >> 1;/* Ensure equal or shorter period than requested */ period &= 0xf8; /* Mask off too large values and lowest unused 3 bits */ - ptd->dw2 |= period; - ptd->dw4 = usof; + ptd->dw2 |= TO_DW(period); + ptd->dw4 = TO_DW(usof); } static void create_ptd_int(struct isp1760_qh *qh, @@ -977,10 +979,10 @@ static void schedule_ptds(struct usb_hcd *hcd) static int check_int_transfer(struct usb_hcd *hcd, struct ptd *ptd, struct urb *urb) { - __dw dw4; + u32 dw4; int i; - dw4 = ptd->dw4; + dw4 = TO_U32(ptd->dw4); dw4 >>= 8; /* FIXME: ISP1761 datasheet does not say what to do with these. Do we