staging: ft1000: change values of status return variable in write_dpram32_and_check

The ft1000 usb driver ignores expected Linux error codes, and uses two
values defined in ft1000_usb.h: STATUS_SUCCESS 0, and STATUS_FAILURE
0x1001; and sometimes -1. This patch changes the return value of the
function write_dpram_32_and check to 0 or -EREMOTEIO, respectively. The
relevant change was made in the helper function check_buffers (which is
only called from write_dpram32_and_check); it now returns 0 on success
and -EREMOTEIO on failure, and this is allowed to propagate through
write_dpram32_and_check. Assignments to the return variable status that
are no longer needed were removed as well. In one function up the call
chain, dsp_reload in ft1000_hw.c, the status variable was changed from
u16 to int to avoid collecting a signed value in an unsigned variable.

Signed-off-by: Kelley Nielsen <kelleynnn@gmail.com>
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2 files changed, 4 insertions, 7 deletions

diff --git a/drivers/staging/ft1000/ft1000-usb/ft1000_download.c b/drivers/staging/ft1000/ft1000-usb/ft1000_download.c
index 605156852b44..72f3cfc95aa1 100644
--- a/drivers/staging/ft1000/ft1000-usb/ft1000_download.c
+++ b/drivers/staging/ft1000/ft1000-usb/ft1000_download.c
@@ -383,7 +383,7 @@ static int check_buffers(u16 *buff_w, u16 *buff_r, int len, int offset)
 
         for (i = 0; i < len; i++) {
                 if (buff_w[i] != buff_r[i + offset])
-                        return -1;
+                        return -EREMOTEIO;
         }
 
         return 0;
@@ -399,7 +399,7 @@ static int write_dpram32_and_check(struct ft1000_usb *ft1000dev,
         for (i = 0; i < 10; i++) {
                 status = ft1000_write_dpram32(ft1000dev, dpram,
                                 (u8 *)&tempbuffer[0], 64);
-                if (status == STATUS_SUCCESS) {
+                if (status == 0) {
                         /* Work around for ASIC bit stuffing problem. */
                         if ((tempbuffer[31] & 0xfe00) == 0xfe00) {
                                 status = ft1000_write_dpram32(ft1000dev,
@@ -414,7 +414,6 @@ static int write_dpram32_and_check(struct ft1000_usb *ft1000dev,
                                                         0)) {
                                         DEBUG("FT1000:download:DPRAM write failed 1 during bootloading\n");
                                         usleep_range(9000, 11000);
-                                        status = STATUS_FAILURE;
                                         break;
                                 }
                                 status = ft1000_read_dpram32(ft1000dev,
@@ -425,7 +424,6 @@ static int write_dpram32_and_check(struct ft1000_usb *ft1000dev,
                                                         24)) {
                                         DEBUG("FT1000:download:DPRAM write failed 2 during bootloading\n");
                                         usleep_range(9000, 11000);
-                                        status = STATUS_FAILURE;
                                         break;
                                 }
                         } else {
@@ -433,11 +431,10 @@ static int write_dpram32_and_check(struct ft1000_usb *ft1000dev,
                                                         0)) {
                                         DEBUG("FT1000:download:DPRAM write failed 3 during bootloading\n");
                                         usleep_range(9000, 11000);
-                                        status = STATUS_FAILURE;
                                         break;
                                 }
                         }
-                        if (status == STATUS_SUCCESS)
+                        if (status == 0)
                                 break;
                 }
         }
diff --git a/drivers/staging/ft1000/ft1000-usb/ft1000_hw.c b/drivers/staging/ft1000/ft1000-usb/ft1000_hw.c
index ca5b56c290fa..0d4931b2c2e2 100644
--- a/drivers/staging/ft1000/ft1000-usb/ft1000_hw.c
+++ b/drivers/staging/ft1000/ft1000-usb/ft1000_hw.c
@@ -521,7 +521,7 @@ void card_send_command(struct ft1000_usb *ft1000dev, void *ptempbuffer,
 //-----------------------------------------------------------------------
 int dsp_reload(struct ft1000_usb *ft1000dev)
 {
-        u16 status;
+        int status;
         u16 tempword;
         u32 templong;