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| author |   Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2014-04-18 14:19:47 +0200 |
|---|---|---|
| committer |   Jason Cooper <jason@lakedaemon.net> | 2014-04-20 19:14:26 +0000 |
| commit | da343fc776e0bcb238b65d9d24610819b95d0ef4 (patch) | |
| tree | 19de124ba0396f270edd3b056b5f175e22699659 /drivers/irqchip | |
| parent | Linux 3.15-rc1 (diff) | |
| download | linux-dev-da343fc776e0bcb238b65d9d24610819b95d0ef4.tar.xz linux-dev-da343fc776e0bcb238b65d9d24610819b95d0ef4.zip | |
irqchip: armada-370-xp: fix invalid cast of signed value into unsigned variable
The armada_370_xp_alloc_msi() function returns a signed int, which is
negative on error. However, we store the return value into an
irq_hw_number_t, which is unsigned. Therefore, we actually never test
if armada_370_xp_alloc_msi() returns an error or not, which may lead
us to use hwirq numbers of as 0xffffffe4 (when
armada_370_xp_alloc_msi() returns -ENOSPC).
This commit fixes that by storing the return value of
armada_370_xp_alloc_msi() in a signed variable.
Fixes: 31f614edb726fcc4d5aa0f2895fbdec9b04a3ca4 ('irqchip: armada-370-xp: implement MSI support')
Cc: <stable@vger.kernel.org> # v3.13+
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Link: https://lkml.kernel.org/r/1397823593-1932-2-git-send-email-thomas.petazzoni@free-electrons.com
Tested-by: Neil Greatorex <neil@fatboyfat.co.uk>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/irq-armada-370-xp.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/irqchip/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c index 41be897df8d5..3c8d89b62a21 100644 --- a/drivers/irqchip/irq-armada-370-xp.c +++ b/drivers/irqchip/irq-armada-370-xp.c @@ -132,8 +132,7 @@ static int armada_370_xp_setup_msi_irq(struct msi_chip *chip, struct msi_desc *desc) { struct msi_msg msg; - irq_hw_number_t hwirq; - int virq; + int virq, hwirq; hwirq = armada_370_xp_alloc_msi(); if (hwirq < 0) |