From e31c51e4a1d11ed0b61557ca9da9cf18c8855531 Mon Sep 17 00:00:00 2001 From: Martyn Welch Date: Tue, 11 Jun 2013 11:20:17 +0100 Subject: [PATCH] vme: tsi148: Only store VME bus errors if they will be checked The TSI148 driver provides an optional mechanism for ensuring that errors resulting from posted transfers are caught whilst still relevant. To do this errors are stored in a link list. If bus errors are not checked, this list would grow until available memory had been exhausted. Only store the errors in a link list if error detection is switched on. Reported-by: De Roo, Steven Signed-off-by: Martyn Welch Signed-off-by: Greg Kroah-Hartman --- drivers/vme/bridges/vme_tsi148.c | 28 +++++++++++++++++----------- 1 file changed, 17 insertions(+), 11 deletions(-) diff --git a/drivers/vme/bridges/vme_tsi148.c b/drivers/vme/bridges/vme_tsi148.c index 9c1aa4dc39c9..94ce64d7a5f6 100644 --- a/drivers/vme/bridges/vme_tsi148.c +++ b/drivers/vme/bridges/vme_tsi148.c @@ -169,7 +169,7 @@ static u32 tsi148_VERR_irqhandler(struct vme_bridge *tsi148_bridge) unsigned int error_addr_high, error_addr_low; unsigned long long error_addr; u32 error_attrib; - struct vme_bus_error *error; + struct vme_bus_error *error = NULL; struct tsi148_driver *bridge; bridge = tsi148_bridge->driver_priv; @@ -186,16 +186,22 @@ static u32 tsi148_VERR_irqhandler(struct vme_bridge *tsi148_bridge) "Occurred\n"); } - error = kmalloc(sizeof(struct vme_bus_error), GFP_ATOMIC); - if (error) { - error->address = error_addr; - error->attributes = error_attrib; - list_add_tail(&error->list, &tsi148_bridge->vme_errors); - } else { - dev_err(tsi148_bridge->parent, "Unable to alloc memory for " - "VMEbus Error reporting\n"); - dev_err(tsi148_bridge->parent, "VME Bus Error at address: " - "0x%llx, attributes: %08x\n", error_addr, error_attrib); + if (err_chk) { + error = kmalloc(sizeof(struct vme_bus_error), GFP_ATOMIC); + if (error) { + error->address = error_addr; + error->attributes = error_attrib; + list_add_tail(&error->list, &tsi148_bridge->vme_errors); + } else { + dev_err(tsi148_bridge->parent, + "Unable to alloc memory for VMEbus Error reporting\n"); + } + } + + if (!error) { + dev_err(tsi148_bridge->parent, + "VME Bus Error at address: 0x%llx, attributes: %08x\n", + error_addr, error_attrib); } /* Clear Status */ -- 2.39.5