From c7abfb47c9e19d63ce6f757afcb392c69ce09765 Mon Sep 17 00:00:00 2001 From: Andy Walls Date: Sun, 9 Nov 2008 19:51:44 -0300 Subject: [PATCH] V4L/DVB (9599): cx18: Fix unitialized variable problem upon APU firmware file read failure If APU firmware file read failed, the jump vector to the APU was undefined and the APU would be started executing garbage. Fix uninitialized variable to be an infinite loop for the APU, but also bail out before even starting the APU. Signed-off-by: Andy Walls Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/cx18/cx18-firmware.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/media/video/cx18/cx18-firmware.c b/drivers/media/video/cx18/cx18-firmware.c index 06f5563d6d5a..d9c5f55ab17c 100644 --- a/drivers/media/video/cx18/cx18-firmware.c +++ b/drivers/media/video/cx18/cx18-firmware.c @@ -153,7 +153,7 @@ static int load_apu_fw_direct(const char *fn, u8 __iomem *dst, struct cx18 *cx, return -ENOMEM; } - *entry_addr = 0xffffffff; + *entry_addr = 0; src = (const u32 *)fw->data; vers = fw->data + sizeof(seghdr); sz = fw->size; @@ -170,7 +170,7 @@ static int load_apu_fw_direct(const char *fn, u8 __iomem *dst, struct cx18 *cx, } CX18_DEBUG_INFO("load segment %x-%x\n", seghdr.addr, seghdr.addr + seghdr.size - 1); - if (*entry_addr == 0xffffffff) + if (*entry_addr == 0) *entry_addr = seghdr.addr; if (offset + seghdr.size > sz) break; @@ -340,10 +340,13 @@ int cx18_firmware_init(struct cx18 *cx) /* Only if the processor is not running */ if (cx18_read_reg(cx, CX18_PROC_SOFT_RESET) & 8) { - u32 fw_entry_addr; + u32 fw_entry_addr = 0; int sz = load_apu_fw_direct("v4l-cx23418-apu.fw", cx->enc_mem, cx, &fw_entry_addr); + if (sz <= 0) + return sz; + /* Clear bit0 for APU to start from 0 */ cx18_write_reg(cx, cx18_read_reg(cx, 0xc72030) & ~1, 0xc72030); -- 2.11.0