Re: [PATCH][i3c-next] i3c: master: fix mask operation by using the correct operator

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Hi Coling,


Thanks for your report.

On 16/11/18 18:42, Colin King wrote:
From: Colin Ian King <colin.king@xxxxxxxxxxxxx>

The masking operation on status is using a bitwise 'or' rather than
a bitwise 'and' operator, and hence the result is always non-zero
which is probably not what is intended. Fix this by using the correct
operator.

Detected by CoverityScan, CID#1475523 ("Wrong operator used")

Fixes: 88acc98a712a ("i3c: master: Add driver for Synopsys DesignWare IP")
Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
---
  drivers/i3c/master/dw-i3c-master.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i3c/master/dw-i3c-master.c b/drivers/i3c/master/dw-i3c-master.c
index 0153e6e9de52..b532e2c9cf5c 100644
--- a/drivers/i3c/master/dw-i3c-master.c
+++ b/drivers/i3c/master/dw-i3c-master.c
@@ -1085,7 +1085,7 @@ static irqreturn_t dw_i3c_master_irq_handler(int irq, void *dev_id)
spin_lock(&master->xferqueue.lock);
  	dw_i3c_master_end_xfer_locked(master, status);
-	if (status | INTR_TRANSFER_ERR_STAT)
+	if (status & INTR_TRANSFER_ERR_STAT)
  		writel(INTR_TRANSFER_ERR_STAT, master->regs + INTR_STATUS);
  	spin_unlock(&master->xferqueue.lock);
Acked-by: Vitor Soares <vitor.soares@xxxxxxxxxxxx>



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