From: Jiang Liu <jiang.liu@linux.intel.com>
Date: Mon, 3 Nov 2014 12:44:20 +0000 (+0800)
Subject: megaraid_sas: fix bug in handling return value of pci_enable_msix_range()
X-Git-Tag: omap-for-v3.19/fixes-for-merge-window~101^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c12de882e7765585ae3a2ae22aa569285951613a;p=pandora-kernel.git

megaraid_sas: fix bug in handling return value of pci_enable_msix_range()

Function pci_enable_msix_range() may return negative values for error
conditions. So it's a bug by checking (pci_enable_msix_range() != 0)
for success and causes failure to megaraid driver when MSI is disabled.
[   16.487267] megaraid_sas 0000:02:00.0: Controller type: iMR
[   16.487275] genirq: Flags mismatch irq 0. 00000000 (megasas) vs. 00015a00 (tii
mer)
[   16.487347] megasas: Failed to register IRQ for vector 0.

Fixes: 8ae80ed1734b "megaraid: Use pci_enable_msix_range() instead of pci_enable_msix()"

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Acked-by: Sumit Saxena <sumit.saxena@avagotech.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: <stable@vger.kernel.org> # 3.17
---

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