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iommu/ipmmu-vmsa: Convert to read_poll_timeout_atomic()

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Use read_poll_timeout_atomic() instead of open-coding the same
operation.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/649c7e09841b998c5c8d7fc274884a85e4b5bfe9.1689599528.git.geert+renesas@glider.be
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Geert Uytterhoeven 2023-07-17 15:14:40 +02:00 committed by Joerg Roedel
parent 06c2afb862
commit aedd11e01d
1 changed files with 6 additions and 9 deletions
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15
drivers/iommu/ipmmu-vmsa.c
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@ -14,6 +14,7 @@
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/io-pgtable.h>
#include <linux/iommu.h>
#include <linux/of.h>
@ -253,17 +254,13 @@ static void ipmmu_imuctr_write(struct ipmmu_vmsa_device *mmu,
/* Wait for any pending TLB invalidations to complete */
static void ipmmu_tlb_sync(struct ipmmu_vmsa_domain *domain)
{
unsigned int count = 0;
u32 val;
while (ipmmu_ctx_read_root(domain, IMCTR) & IMCTR_FLUSH) {
cpu_relax();
if (++count == TLB_LOOP_TIMEOUT) {
dev_err_ratelimited(domain->mmu->dev,
if (read_poll_timeout_atomic(ipmmu_ctx_read_root, val,
!(val & IMCTR_FLUSH), 1, TLB_LOOP_TIMEOUT,
false, domain, IMCTR))
dev_err_ratelimited(domain->mmu->dev,
"TLB sync timed out -- MMU may be deadlocked\n");
return;
}
udelay(1);
}
}
static void ipmmu_tlb_invalidate(struct ipmmu_vmsa_domain *domain)