diff options
Diffstat (limited to 'target/linux/generic/patches-4.9')
| -rw-r--r-- | target/linux/generic/patches-4.9/040-06-MIPS-IRQ-Stack-Fix-erroneous-jal-to-plat_irq_dispatc.patch | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/target/linux/generic/patches-4.9/040-06-MIPS-IRQ-Stack-Fix-erroneous-jal-to-plat_irq_dispatc.patch b/target/linux/generic/patches-4.9/040-06-MIPS-IRQ-Stack-Fix-erroneous-jal-to-plat_irq_dispatc.patch new file mode 100644 index 0000000000..bb16bb14ab --- /dev/null +++ b/target/linux/generic/patches-4.9/040-06-MIPS-IRQ-Stack-Fix-erroneous-jal-to-plat_irq_dispatc.patch @@ -0,0 +1,35 @@ +From de856416e7143e32afc4849625616554aa060f7a Mon Sep 17 00:00:00 2001 +From: Matt Redfearn <matt.redfearn@imgtec.com> +Date: Wed, 25 Jan 2017 17:00:25 +0000 +Subject: [PATCH] MIPS: IRQ Stack: Fix erroneous jal to plat_irq_dispatch + +Commit dda45f701c9d ("MIPS: Switch to the irq_stack in interrupts") +changed both the normal and vectored interrupt handlers. Unfortunately +the vectored version, "except_vec_vi_handler", was incorrectly modified +to unconditionally jal to plat_irq_dispatch, rather than doing a jalr to +the vectored handler that has been set up. This is ok for many platforms +which set the vectored handler to plat_irq_dispatch anyway, but will +cause problems with platforms that use other handlers. + +Fixes: dda45f701c9d ("MIPS: Switch to the irq_stack in interrupts") +Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com> +Cc: Ralf Baechle <ralf@linux-mips.org> +Cc: Paul Burton <paul.burton@imgtec.com> +Cc: linux-mips@linux-mips.org +Patchwork: https://patchwork.linux-mips.org/patch/15110/ +Signed-off-by: James Hogan <james.hogan@imgtec.com> +--- + arch/mips/kernel/genex.S | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/arch/mips/kernel/genex.S ++++ b/arch/mips/kernel/genex.S +@@ -329,7 +329,7 @@ NESTED(except_vec_vi_handler, 0, sp) + PTR_ADD sp, t0, t1 + + 2: +- jal plat_irq_dispatch ++ jalr v0 + + /* Restore sp */ + move sp, s1 |