[MTD] SSFDC translation layer minor cleanup

Don't include <linux/config.h>.
Don't say 'MB' where you mean 'MiB'.
Don't allocate 512 bytes on the stack.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

1 files changed, 21 insertions, 15 deletions

diff --git a/drivers/mtd/ssfdc.c b/drivers/mtd/ssfdc.c
index ddbf015f4119..cf60a5e87f19 100644
--- a/drivers/mtd/ssfdc.c
+++ b/drivers/mtd/ssfdc.c
@@ -10,7 +10,6 @@
  * published by the Free Software Foundation.
  */
 
-#include <linux/config.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
@@ -29,7 +28,7 @@ struct ssfdcr_record {
         int cis_block;                  /* block n. containing CIS/IDI */
         int erase_size;                 /* phys_block_size */
         unsigned short *logic_block_map; /* all zones (max 8192 phys blocks on
-                                            the 128MB) */
+                                            the 128MiB) */
         int map_len;                    /* n. phys_blocks on the card */
 };
 
@@ -43,11 +42,11 @@ struct ssfdcr_record {
 #define MAX_LOGIC_BLK_PER_ZONE  1000
 #define MAX_PHYS_BLK_PER_ZONE   1024
 
-#define KB(x)   ( (x) * 1024L )
-#define MB(x)   ( KB(x) * 1024L )
+#define KiB(x)  ( (x) * 1024L )
+#define MiB(x)  ( KiB(x) * 1024L )
 
 /** CHS Table
-                1MB     2MB     4MB     8MB     16MB    32MB    64MB    128MB
+                1MiB    2MiB    4MiB    8MiB    16MiB   32MiB   64MiB   128MiB
 NCylinder       125     125     250     250     500     500     500     500
 NHead           4       4       4       4       4       8       8       16
 NSector         4       8       8       16      16      16      32      32
@@ -64,14 +63,14 @@ typedef struct {
 
 /* Must be ordered by size */
 static const chs_entry_t chs_table[] = {
-        { MB(  1), 125,  4,  4 },
-        { MB(  2), 125,  4,  8 },
-        { MB(  4), 250,  4,  8 },
-        { MB(  8), 250,  4, 16 },
-        { MB( 16), 500,  4, 16 },
-        { MB( 32), 500,  8, 16 },
-        { MB( 64), 500,  8, 32 },
-        { MB(128), 500, 16, 32 },
+        { MiB(  1), 125,  4,  4 },
+        { MiB(  2), 125,  4,  8 },
+        { MiB(  4), 250,  4,  8 },
+        { MiB(  8), 250,  4, 16 },
+        { MiB( 16), 500,  4, 16 },
+        { MiB( 32), 500,  8, 16 },
+        { MiB( 64), 500,  8, 32 },
+        { MiB(128), 500, 16, 32 },
         { 0 },
 };
 
@@ -109,14 +108,19 @@ static int get_valid_cis_sector(struct mtd_info *mtd)
         int ret, k, cis_sector;
         size_t retlen;
         loff_t offset;
-        uint8_t sect_buf[SECTOR_SIZE];
+        uint8_t *sect_buf;
+
+        cis_sector = -1;
+
+        sect_buf = kmalloc(SECTOR_SIZE, GFP_KERNEL);
+        if (!sect_buf)
+                goto out;
 
         /*
          * Look for CIS/IDI sector on the first GOOD block (give up after 4 bad
          * blocks). If the first good block doesn't contain CIS number the flash
          * is not SSFDC formatted
          */
-        cis_sector = -1;
         for (k = 0, offset = 0; k < 4; k++, offset += mtd->erasesize) {
                 if (!mtd->block_isbad(mtd, offset)) {
                         ret = mtd->read(mtd, offset, SECTOR_SIZE, &retlen,
@@ -140,6 +144,8 @@ static int get_valid_cis_sector(struct mtd_info *mtd)
                 }
         }
 
+        kfree(sect_buf);
+ out:
         return cis_sector;
 }