@@ -216,7 +216,7 @@ void mvs_set_sas_addr(struct mvs_info *mvi, int port_id, u32 off_lo,
MVS_CHIP_DISP->write_port_cfg_data(mvi, port_id, hi);
}
-static void mvs_bytes_dmaed(struct mvs_info *mvi, int i)
+static void mvs_bytes_dmaed(struct mvs_info *mvi, int i, gfp_t gfp_flags)
{
struct mvs_phy *phy = &mvi->phy[i];
struct asd_sas_phy *sas_phy = &phy->sas_phy;
@@ -229,7 +229,7 @@ static void mvs_bytes_dmaed(struct mvs_info *mvi, int i)
return;
}
- sas_notify_phy_event(sas_phy, PHYE_OOB_DONE);
+ sas_notify_phy_event_gfp(sas_phy, PHYE_OOB_DONE, gfp_flags);
if (sas_phy->phy) {
struct sas_phy *sphy = sas_phy->phy;
@@ -261,7 +261,7 @@ static void mvs_bytes_dmaed(struct mvs_info *mvi, int i)
sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
- sas_notify_port_event(sas_phy, PORTE_BYTES_DMAED);
+ sas_notify_port_event_gfp(sas_phy, PORTE_BYTES_DMAED, gfp_flags);
}
void mvs_scan_start(struct Scsi_Host *shost)
@@ -277,7 +277,7 @@ void mvs_scan_start(struct Scsi_Host *shost)
for (j = 0; j < core_nr; j++) {
mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[j];
for (i = 0; i < mvi->chip->n_phy; ++i)
- mvs_bytes_dmaed(mvi, i);
+ mvs_bytes_dmaed(mvi, i, GFP_KERNEL);
}
mvs_prv->scan_finished = 1;
}
@@ -1892,20 +1892,21 @@ static void mvs_work_queue(struct work_struct *work)
if (!(tmp & PHY_READY_MASK)) {
sas_phy_disconnected(sas_phy);
mvs_phy_disconnected(phy);
- sas_notify_phy_event(sas_phy,
- PHYE_LOSS_OF_SIGNAL);
+ sas_notify_phy_event_gfp(sas_phy,
+ PHYE_LOSS_OF_SIGNAL, GFP_ATOMIC);
mv_dprintk("phy%d Removed Device\n", phy_no);
} else {
MVS_CHIP_DISP->detect_porttype(mvi, phy_no);
mvs_update_phyinfo(mvi, phy_no, 1);
- mvs_bytes_dmaed(mvi, phy_no);
+ mvs_bytes_dmaed(mvi, phy_no, GFP_ATOMIC);
mvs_port_notify_formed(sas_phy, 0);
mv_dprintk("phy%d Attached Device\n", phy_no);
}
}
} else if (mwq->handler & EXP_BRCT_CHG) {
phy->phy_event &= ~EXP_BRCT_CHG;
- sas_notify_port_event(sas_phy, PORTE_BROADCAST_RCVD);
+ sas_notify_port_event_gfp(sas_phy,
+ PORTE_BROADCAST_RCVD, GFP_ATOMIC);
mv_dprintk("phy%d Got Broadcast Change\n", phy_no);
}
list_del(&mwq->entry);
@@ -2022,7 +2023,7 @@ void mvs_int_port(struct mvs_info *mvi, int phy_no, u32 events)
mdelay(10);
}
- mvs_bytes_dmaed(mvi, phy_no);
+ mvs_bytes_dmaed(mvi, phy_no, GFP_ATOMIC);
/* whether driver is going to handle hot plug */
if (phy->phy_event & PHY_PLUG_OUT) {
mvs_port_notify_formed(&phy->sas_phy, 0);
mvsas calls the non _gfp version of the libsas event notifiers API, leading to the buggy call chains below: mvsas/mv_sas.c: mvs_work_queue() [process context] spin_lock_irqsave(mvs_info::lock, ) -> libsas/sas_event.c: sas_notify_phy_event() -> sas_alloc_event() -> in_interrupt() = false -> invalid GFP_KERNEL allocation -> libsas/sas_event.c: sas_notify_port_event() -> sas_alloc_event() -> in_interrupt() = false -> invalid GFP_KERNEL allocation Use the new event notifiers API instead, which requires callers to explicitly pass the gfp_t memory allocation flags. Below are context analysis for the modified functions: => mvs_bytes_dmaed(): Since it is invoked from both process and atomic contexts, let its callers pass the gfp_t flags. Call chains: scsi_scan.c: do_scsi_scan_host() [has msleep()] -> shost->hostt->scan_start() -> [mvsas/mv_init.c: Scsi_Host::scsi_host_template .scan_start = mvs_scan_start()] -> mvsas/mv_sas.c: mvs_scan_start() -> mvs_bytes_dmaed(..., GFP_KERNEL) mvsas/mv_sas.c: mvs_work_queue() spin_lock_irqsave(mvs_info::lock,) -> mvs_bytes_dmaed(..., GFP_ATOMIC) mvsas/mv_64xx.c: mvs_64xx_isr() || mvsas/mv_94xx.c: mvs_94xx_isr() -> mvsas/mv_chips.h: mvs_int_full() -> mvsas/mv_sas.c: mvs_int_port() -> mvs_bytes_dmaed(..., GFP_ATOMIC); => mvs_work_queue(): Invoked from process context, but it calls all the libsas event notifier APIs under a spin_lock_irqsave(). Pass GFP_ATOMIC. Fixes: 1c393b970e0f ("scsi: libsas: Use dynamic alloced work to avoid sas event lost") Signed-off-by: Ahmed S. Darwish <a.darwish@linutronix.de> Reviewed-by: John Garry <john.garry@huawei.com> Cc: Jason Yan <yanaijie@huawei.com> --- drivers/scsi/mvsas/mv_sas.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-)