iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net: ipa: clear disabled IPA interrupt conditions

Browse Source 
We ignore any IPA interrupt that has no handler.  If any interrupt
conditions without a handler exist when an IPA interrupt occurs,
clear those conditions.  Add a debug message to report which ones
are being cleared.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alex Elder 2021-07-27 14:46:27 -05:00 committed by David S. Miller
parent 937a0da432
commit e70e410f8e
1 changed files with 14 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/net/ipa/ipa_interrupt.c
View File

@ -79,6 +79,7 @@ static void ipa_interrupt_process_all(struct ipa_interrupt *interrupt)
{
struct ipa *ipa = interrupt->ipa;
u32 enabled = interrupt->enabled;
u32 pending;
u32 offset;
u32 mask;
@ -87,8 +88,8 @@ static void ipa_interrupt_process_all(struct ipa_interrupt *interrupt)
* only the enabled ones.
*/
offset = ipa_reg_irq_stts_offset(ipa->version);
mask = ioread32(ipa->reg_virt + offset);
while ((mask &= enabled)) {
pending = ioread32(ipa->reg_virt + offset);
while ((mask = pending & enabled)) {
do {
u32 irq_id = __ffs(mask);
@ -96,7 +97,17 @@ static void ipa_interrupt_process_all(struct ipa_interrupt *interrupt)
ipa_interrupt_process(interrupt, irq_id);
} while (mask);
mask = ioread32(ipa->reg_virt + offset);
pending = ioread32(ipa->reg_virt + offset);
}
/* If any disabled interrupts are pending, clear them */
if (pending) {
struct device *dev = &ipa->pdev->dev;
dev_dbg(dev, "clearing disabled IPA interrupts 0x%08x\n",
pending);
offset = ipa_reg_irq_clr_offset(ipa->version);
iowrite32(pending, ipa->reg_virt + offset);
}
}