| From | Kamal Mostafa <> | Subject | [PATCH 3.13 100/160] irqchip: armada-370-xp: fix invalid cast of signed value into unsigned variable | Date | Tue, 10 Jun 2014 12:45:40 -0700 |
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3.13.11.3 -stable review patch. If anyone has any objections, please let me know.
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From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
commit da343fc776e0bcb238b65d9d24610819b95d0ef4 upstream.
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') 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> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- drivers/irqchip/irq-armada-370-xp.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/irqchip/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c index 3fac063..79eb0d1 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) -- 1.9.1
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