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-rw-r--r--target/linux/mvebu/patches-3.10/0086-irqchip-armada-370-xp-fix-MSI-race-condition.patch44
1 files changed, 0 insertions, 44 deletions
diff --git a/target/linux/mvebu/patches-3.10/0086-irqchip-armada-370-xp-fix-MSI-race-condition.patch b/target/linux/mvebu/patches-3.10/0086-irqchip-armada-370-xp-fix-MSI-race-condition.patch
deleted file mode 100644
index ebbc532..0000000
--- a/target/linux/mvebu/patches-3.10/0086-irqchip-armada-370-xp-fix-MSI-race-condition.patch
+++ /dev/null
@@ -1,44 +0,0 @@
-From ddda6fa410b6e50ee67d4a628187e76b4a6c9b28 Mon Sep 17 00:00:00 2001
-From: Lior Amsalem <alior@marvell.com>
-Date: Mon, 25 Nov 2013 17:26:45 +0100
-Subject: [PATCH 086/203] irqchip: armada-370-xp: fix MSI race condition
-
-In the Armada 370/XP driver, when we receive an IRQ 1, we read the
-list of doorbells that caused the interrupt from register
-ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS. This gives the list of MSIs that
-were generated. However, instead of acknowledging only the MSIs that
-were generated, we acknowledge *all* the MSIs, by writing
-~MSI_DOORBELL_MASK in the ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS register.
-
-This creates a race condition: if a new MSI that isn't part of the
-ones read into the temporary "msimask" variable is fired before we
-acknowledge all MSIs, then we will simply loose it.
-
-It is important to mention that this ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS
-register has the following behavior: "A CPU write of 0 clears the bits
-in this field. A CPU write of 1 has no effect". This is what allows us
-to simply write ~msimask to acknoledge the handled MSIs.
-
-Notice that the same problem is present in the IPI implementation, but
-it is fixed as a separate patch, so that this IPI fix can be pushed to
-older stable versions as appropriate (all the way to 3.8), while the
-MSI code only appeared in 3.13.
-
-Signed-off-by: Lior Amsalem <alior@marvell.com>
-Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
-Cc: Thomas Gleixner <tglx@linutronix.de>
----
- drivers/irqchip/irq-armada-370-xp.c | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
---- a/drivers/irqchip/irq-armada-370-xp.c
-+++ b/drivers/irqchip/irq-armada-370-xp.c
-@@ -381,7 +381,7 @@ armada_370_xp_handle_irq(struct pt_regs
- ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS)
- & PCI_MSI_DOORBELL_MASK;
-
-- writel(~PCI_MSI_DOORBELL_MASK, per_cpu_int_base +
-+ writel(~msimask, per_cpu_int_base +
- ARMADA_370_XP_IN_DRBEL_CAUSE_OFFS);
-
- for (msinr = PCI_MSI_DOORBELL_START;