6.6-stable review patch. If anyone has any objections, please let me know.
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From: Hector Martin marcan@marcan.st
[ Upstream commit ecf6508923f87e4597228f70cc838af3d37f6662 ]
These registers exist and at least on the t602x variant the IRQ only clears when theses are cleared.
Signed-off-by: Hector Martin marcan@marcan.st Signed-off-by: Janne Grunau j@jannau.net Reviewed-by: Sven Peter sven@kernel.org Reviewed-by: Neal Gompa neal@gompa.dev Link: https://lore.kernel.org/r/20250826-dart-t8110-stream-error-v1-1-e33395112014... Signed-off-by: Joerg Roedel joerg.roedel@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/iommu/apple-dart.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/iommu/apple-dart.c b/drivers/iommu/apple-dart.c index 0b89275084274..0ea450cbb7786 100644 --- a/drivers/iommu/apple-dart.c +++ b/drivers/iommu/apple-dart.c @@ -121,6 +121,8 @@ #define DART_T8110_ERROR_ADDR_LO 0x170 #define DART_T8110_ERROR_ADDR_HI 0x174
+#define DART_T8110_ERROR_STREAMS 0x1c0 + #define DART_T8110_PROTECT 0x200 #define DART_T8110_UNPROTECT 0x204 #define DART_T8110_PROTECT_LOCK 0x208 @@ -1041,6 +1043,9 @@ static irqreturn_t apple_dart_t8110_irq(int irq, void *dev) error, stream_idx, error_code, fault_name, addr);
writel(error, dart->regs + DART_T8110_ERROR); + for (int i = 0; i < BITS_TO_U32(dart->num_streams); i++) + writel(U32_MAX, dart->regs + DART_T8110_ERROR_STREAMS + 4 * i); + return IRQ_HANDLED; }