V4L/DVB (8423): cx18: remove firmware size check

This check was an ivtv leftover that served no purpose for the cx18.
Removed it, as this allows the user to load different firmware versions.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 13 insertions, 41 deletions

diff --git a/drivers/media/video/cx18/cx18-firmware.c b/drivers/media/video/cx18/cx18-firmware.c
index 2d630d9f7496..78fadd2ada5d 100644
--- a/drivers/media/video/cx18/cx18-firmware.c
+++ b/drivers/media/video/cx18/cx18-firmware.c
@@ -86,10 +86,6 @@
 
 #define CX18_DSP0_INTERRUPT_MASK        0xd0004C
 
-/* Encoder/decoder firmware sizes */
-#define CX18_FW_CPU_SIZE                (158332)
-#define CX18_FW_APU_SIZE                (141200)
-
 #define APU_ROM_SYNC1 0x6D676553 /* "mgeS" */
 #define APU_ROM_SYNC2 0x72646548 /* "rdeH" */
 
@@ -100,35 +96,22 @@ struct cx18_apu_rom_seghdr {
         u32 size;
 };
 
-static int load_cpu_fw_direct(const char *fn, u8 __iomem *mem, struct cx18 *cx, long size)
+static int load_cpu_fw_direct(const char *fn, u8 __iomem *mem, struct cx18 *cx)
 {
         const struct firmware *fw = NULL;
-        int retries = 3;
         int i, j;
+        unsigned size;
         u32 __iomem *dst = (u32 __iomem *)mem;
         const u32 *src;
 
-retry:
-        if (!retries || request_firmware(&fw, fn, &cx->dev->dev)) {
-                CX18_ERR("Unable to open firmware %s (must be %ld bytes)\n",
-                                fn, size);
+        if (request_firmware(&fw, fn, &cx->dev->dev)) {
+                CX18_ERR("Unable to open firmware %s\n", fn);
                 CX18_ERR("Did you put the firmware in the hotplug firmware directory?\n");
                 return -ENOMEM;
         }
 
         src = (const u32 *)fw->data;
 
-        if (fw->size != size) {
-                /* Due to race conditions in firmware loading (esp. with
-                   udev <0.95) the wrong file was sometimes loaded. So we check
-                   filesizes to see if at least the right-sized file was
-                   loaded. If not, then we retry. */
-                CX18_INFO("retry: file loaded was not %s (expected size %ld, got %zd)\n",
-                                fn, size, fw->size);
-                release_firmware(fw);
-                retries--;
-                goto retry;
-        }
         for (i = 0; i < fw->size; i += 4096) {
                 setup_page(i);
                 for (j = i; j < fw->size && j < i + 4096; j += 4) {
@@ -145,15 +128,16 @@ retry:
         }
         if (!test_bit(CX18_F_I_LOADED_FW, &cx->i_flags))
                 CX18_INFO("loaded %s firmware (%zd bytes)\n", fn, fw->size);
+        size = fw->size;
         release_firmware(fw);
         return size;
 }
 
-static int load_apu_fw_direct(const char *fn, u8 __iomem *dst, struct cx18 *cx, long size)
+static int load_apu_fw_direct(const char *fn, u8 __iomem *dst, struct cx18 *cx)
 {
         const struct firmware *fw = NULL;
-        int retries = 3;
         int i, j;
+        unsigned size;
         const u32 *src;
         struct cx18_apu_rom_seghdr seghdr;
         const u8 *vers;
@@ -161,10 +145,8 @@ static int load_apu_fw_direct(const char *fn, u8 __iomem *dst, struct cx18 *cx,
         u32 apu_version = 0;
         int sz;
 
-retry:
-        if (!retries || request_firmware(&fw, fn, &cx->dev->dev)) {
-                CX18_ERR("unable to open firmware %s (must be %ld bytes)\n",
-                                fn, size);
+        if (request_firmware(&fw, fn, &cx->dev->dev)) {
+                CX18_ERR("unable to open firmware %s\n", fn);
                 CX18_ERR("did you put the firmware in the hotplug firmware directory?\n");
                 return -ENOMEM;
         }
@@ -173,19 +155,8 @@ retry:
         vers = fw->data + sizeof(seghdr);
         sz = fw->size;
 
-        if (fw->size != size) {
-                /* Due to race conditions in firmware loading (esp. with
-                   udev <0.95) the wrong file was sometimes loaded. So we check
-                   filesizes to see if at least the right-sized file was
-                   loaded. If not, then we retry. */
-                CX18_INFO("retry: file loaded was not %s (expected size %ld, got %zd)\n",
-                               fn, size, fw->size);
-                release_firmware(fw);
-                retries--;
-                goto retry;
-        }
         apu_version = (vers[0] << 24) | (vers[4] << 16) | vers[32];
-        while (offset + sizeof(seghdr) < size) {
+        while (offset + sizeof(seghdr) < fw->size) {
                 /* TODO: byteswapping */
                 memcpy(&seghdr, src + offset / 4, sizeof(seghdr));
                 offset += sizeof(seghdr);
@@ -215,6 +186,7 @@ retry:
         if (!test_bit(CX18_F_I_LOADED_FW, &cx->i_flags))
                 CX18_INFO("loaded %s firmware V%08x (%zd bytes)\n",
                                 fn, apu_version, fw->size);
+        size = fw->size;
         release_firmware(fw);
         /* Clear bit0 for APU to start from 0 */
         write_reg(read_reg(0xc72030) & ~1, 0xc72030);
@@ -340,7 +312,7 @@ int cx18_firmware_init(struct cx18 *cx)
         /* Only if the processor is not running */
         if (read_reg(CX18_PROC_SOFT_RESET) & 8) {
                 int sz = load_apu_fw_direct("v4l-cx23418-apu.fw",
-                               cx->enc_mem, cx, CX18_FW_APU_SIZE);
+                               cx->enc_mem, cx);
 
                 write_enc(0xE51FF004, 0);
                 write_enc(0xa00000, 4);  /* todo: not hardcoded */
@@ -348,7 +320,7 @@ int cx18_firmware_init(struct cx18 *cx)
                 cx18_msleep_timeout(500, 0);
 
                 sz = sz <= 0 ? sz : load_cpu_fw_direct("v4l-cx23418-cpu.fw",
-                                        cx->enc_mem, cx, CX18_FW_CPU_SIZE);
+                                        cx->enc_mem, cx);
 
                 if (sz > 0) {
                         int retries = 0;