From: Chris Ball <chris@xxxxxxxxxx>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
commit 5152970538a5e16c03bbcb9f1c780489a795ed40 upstream.
pci_enable_msi() can return failure with both positive and negative
integers -- it returns 0 for success -- but is only tested here for
"if (ret < 0)". This causes us to try to use MSI on the RTS5249 SD
reader in the Dell XPS 11 when enabling MSI failed, causing:
[ 1.737110] rtsx_pci: probe of 0000:05:00.0 failed with error -110
Reported-by: D. Jared Dominguez <Jared_Dominguez@xxxxxxxx>
Tested-by: D. Jared Dominguez <Jared_Dominguez@xxxxxxxx>
Signed-off-by: Chris Ball <chris@xxxxxxxxxx>
Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
drivers/mfd/rtsx_pcr.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mfd/rtsx_pcr.c b/drivers/mfd/rtsx_pcr.c
index 6ed83feb0c52..c2a7804014f4 100644
--- a/drivers/mfd/rtsx_pcr.c
+++ b/drivers/mfd/rtsx_pcr.c
@@ -1172,7 +1172,7 @@ static int rtsx_pci_probe(struct pci_dev *pcidev,
pcr->msi_en = msi_en;
if (pcr->msi_en) {
ret = pci_enable_msi(pcidev);
- if (ret < 0)
+ if (ret)
pcr->msi_en = false;
}
--
2.1.3
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