redonkable
/
remarkable-linux
1
0
Fork 0
Code Releases Activity

memory: tegra: Do not handle spurious interrupts 

[ Upstream commit bf3fbdfbec ]

The ISR reads interrupts-enable mask, but doesn't utilize it. Apply the
mask to the interrupt status and don't handle interrupts that MC driver
haven't asked for. Kernel would disable spurious MC IRQ and report the
error. This would happen only in a case of a very severe bug.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Dmitry Osipenko 2018-04-09 22:28:27 +03:00 committed by Greg Kroah-Hartman
parent c06f5a018f
commit 9746d3696d
1 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/memory/tegra/mc.c
View File

@ -252,8 +252,11 @@ static irqreturn_t tegra_mc_irq(int irq, void *data)
unsigned int bit;
/* mask all interrupts to avoid flooding */
status = mc_readl(mc, MC_INTSTATUS);
mask = mc_readl(mc, MC_INTMASK);
status = mc_readl(mc, MC_INTSTATUS) & mask;
if (!status)
return IRQ_NONE;
for_each_set_bit(bit, &status, 32) {
const char *error = status_names[bit] ?: "unknown";