From 1c339eb183bb48095feaa46057ac4f4f0603dbf9 Mon Sep 17 00:00:00 2001 From: Scott James Remnant Date: Fri, 13 Mar 2009 14:30:08 -0700 Subject: [PATCH 1/3] sbus: Auto-load openprom module when device opened. The openprom module is missing the char-major-10-139 alias that would cause it to be auto-loaded when a device of that type is opened. This patch adds the alias. Signed-off-by: Scott James Remnant Signed-off-by: Tim Gardner Signed-off-by: David S. Miller --- drivers/sbus/char/openprom.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/sbus/char/openprom.c b/drivers/sbus/char/openprom.c index 29dc735e1a20..124f660a0383 100644 --- a/drivers/sbus/char/openprom.c +++ b/drivers/sbus/char/openprom.c @@ -51,6 +51,7 @@ MODULE_AUTHOR("Thomas K. Dyas (tdyas@noc.rutgers.edu) and Eddie C. Dost (ecd@sk MODULE_DESCRIPTION("OPENPROM Configuration Driver"); MODULE_LICENSE("GPL"); MODULE_VERSION("1.0"); +MODULE_ALIAS_MISCDEV(SUN_OPENPROM_MINOR); /* Private data kept by the driver for each descriptor. */ typedef struct openprom_private_data From 42cc77c861e8e850e86252bb5b1e12e006261973 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Wed, 18 Mar 2009 23:51:57 -0700 Subject: [PATCH 2/3] sparc64: Reschedule KGDB capture to a software interrupt. Otherwise it might interrupt switch_to() midstream and use half-cooked register window state. Reported-by: Chris Torek Signed-off-by: David S. Miller --- arch/sparc/include/asm/pil.h | 1 + arch/sparc/kernel/kgdb_64.c | 2 +- arch/sparc/kernel/ttable.S | 7 ++++++- arch/sparc/mm/ultra.S | 24 ++---------------------- 4 files changed, 10 insertions(+), 24 deletions(-) diff --git a/arch/sparc/include/asm/pil.h b/arch/sparc/include/asm/pil.h index 32a7efe76d00..266937030546 100644 --- a/arch/sparc/include/asm/pil.h +++ b/arch/sparc/include/asm/pil.h @@ -24,6 +24,7 @@ #define PIL_DEVICE_IRQ 5 #define PIL_SMP_CALL_FUNC_SNGL 6 #define PIL_DEFERRED_PCR_WORK 7 +#define PIL_KGDB_CAPTURE 8 #define PIL_NORMAL_MAX 14 #define PIL_NMI 15 diff --git a/arch/sparc/kernel/kgdb_64.c b/arch/sparc/kernel/kgdb_64.c index fefbe6dc51be..f5a0fd490b59 100644 --- a/arch/sparc/kernel/kgdb_64.c +++ b/arch/sparc/kernel/kgdb_64.c @@ -108,7 +108,7 @@ void gdb_regs_to_pt_regs(unsigned long *gdb_regs, struct pt_regs *regs) } #ifdef CONFIG_SMP -void smp_kgdb_capture_client(struct pt_regs *regs) +void smp_kgdb_capture_client(int irq, struct pt_regs *regs) { unsigned long flags; diff --git a/arch/sparc/kernel/ttable.S b/arch/sparc/kernel/ttable.S index d9bdfb9d5c18..76d837fc47d3 100644 --- a/arch/sparc/kernel/ttable.S +++ b/arch/sparc/kernel/ttable.S @@ -64,7 +64,12 @@ tl0_irq6: TRAP_IRQ(smp_call_function_single_client, 6) tl0_irq6: BTRAP(0x46) #endif tl0_irq7: TRAP_IRQ(deferred_pcr_work_irq, 7) -tl0_irq8: BTRAP(0x48) BTRAP(0x49) +#ifdef CONFIG_KGDB +tl0_irq8: TRAP_IRQ(smp_kgdb_capture_client, 8) +#else +tl0_irq8: BTRAP(0x48) +#endif +tl0_irq9: BTRAP(0x49) tl0_irq10: BTRAP(0x4a) BTRAP(0x4b) BTRAP(0x4c) BTRAP(0x4d) tl0_irq14: TRAP_IRQ(timer_interrupt, 14) tl0_irq15: TRAP_NMI_IRQ(perfctr_irq, 15) diff --git a/arch/sparc/mm/ultra.S b/arch/sparc/mm/ultra.S index 80c788ec7c32..b57a5942ba64 100644 --- a/arch/sparc/mm/ultra.S +++ b/arch/sparc/mm/ultra.S @@ -679,28 +679,8 @@ xcall_new_mmu_context_version: #ifdef CONFIG_KGDB .globl xcall_kgdb_capture xcall_kgdb_capture: -661: rdpr %pstate, %g2 - wrpr %g2, PSTATE_IG | PSTATE_AG, %pstate - .section .sun4v_2insn_patch, "ax" - .word 661b - nop - nop - .previous - - rdpr %pil, %g2 - wrpr %g0, PIL_NORMAL_MAX, %pil - sethi %hi(109f), %g7 - ba,pt %xcc, etrap_irq -109: or %g7, %lo(109b), %g7 -#ifdef CONFIG_TRACE_IRQFLAGS - call trace_hardirqs_off - nop -#endif - call smp_kgdb_capture_client - add %sp, PTREGS_OFF, %o0 - /* Has to be a non-v9 branch due to the large distance. */ - ba rtrap_xcall - ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %l1 + wr %g0, (1 << PIL_KGDB_CAPTURE), %set_softint + retry #endif #endif /* CONFIG_SMP */ From 192d7a4667c6d11d1a174ec4cad9a3c5d5f9043c Mon Sep 17 00:00:00 2001 From: Mikulas Patocka Date: Wed, 18 Mar 2009 23:53:16 -0700 Subject: [PATCH 3/3] sparc64: Fix crash with /proc/iomem When you compile kernel on Sparc64 with heap memory checking and type "cat /proc/iomem", you get a crash, because pointers in struct resource are uninitialized. Most code fills struct resource with zeros, so I assume that it is responsibility of the caller of request_resource to initialized it, not the responsibility of request_resource functuion. After 2.6.29 is out, there could be a check for uninitialized fields added to request_resource to avoid crashes like this. Signed-off-by: Mikulas Patocka Signed-off-by: David S. Miller --- arch/sparc/kernel/pci_common.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/sparc/kernel/pci_common.c b/arch/sparc/kernel/pci_common.c index 64e6edf17b9d..b775658a927d 100644 --- a/arch/sparc/kernel/pci_common.c +++ b/arch/sparc/kernel/pci_common.c @@ -368,7 +368,7 @@ static void pci_register_iommu_region(struct pci_pbm_info *pbm) const u32 *vdma = of_get_property(pbm->op->node, "virtual-dma", NULL); if (vdma) { - struct resource *rp = kmalloc(sizeof(*rp), GFP_KERNEL); + struct resource *rp = kzalloc(sizeof(*rp), GFP_KERNEL); if (!rp) { prom_printf("Cannot allocate IOMMU resource.\n");