From: Madhuparna Bhowmik <madhuparnabhowmik10@xxxxxxxxx>
Currently in c67x00_drv_probe() IRQ is requested before calling
c67x00_probe_sie() and hence if interrupt happens the reading of certain
variables in the handler can race with initialization of the variables,
for e.g. sie->sie_num is written in c67x00_probe_sie() and read in
c67x00_hcd_irq().
Hence, this patch calls c67x00_probe_sie() before requesting IRQ in
probe.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@xxxxxxxxx>
---
drivers/usb/c67x00/c67x00-drv.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/c67x00/c67x00-drv.c b/drivers/usb/c67x00/c67x00-drv.c
index 53838e7d4eef..2e816d5ca0eb 100644
--- a/drivers/usb/c67x00/c67x00-drv.c
+++ b/drivers/usb/c67x00/c67x00-drv.c
@@ -146,6 +146,9 @@ static int c67x00_drv_probe(struct platform_device *pdev)
c67x00_ll_init(c67x00);
c67x00_ll_hpi_reg_init(c67x00);
+ for (i = 0; i < C67X00_SIES; i++)
+ c67x00_probe_sie(&c67x00->sie[i], c67x00, i);
+
ret = request_irq(res2->start, c67x00_irq, 0, pdev->name, c67x00);
if (ret) {
dev_err(&pdev->dev, "Cannot claim IRQ\n");
@@ -158,9 +161,6 @@ static int c67x00_drv_probe(struct platform_device *pdev)
goto reset_failed;
}
- for (i = 0; i < C67X00_SIES; i++)
- c67x00_probe_sie(&c67x00->sie[i], c67x00, i);
-
platform_set_drvdata(pdev, c67x00);
return 0;
--
2.17.1
