memstick: fix parsing of "assembly_date" attribute field

Signed-off-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 16 insertions, 2 deletions

diff --git a/drivers/memstick/core/mspro_block.c b/drivers/memstick/core/mspro_block.c
index 2381c5d7275b..62b913ba9b97 100644
--- a/drivers/memstick/core/mspro_block.c
+++ b/drivers/memstick/core/mspro_block.c
@@ -303,6 +303,20 @@ static ssize_t mspro_block_attr_show_sysinfo(struct device *dev,
                                                      dev_attr);
         struct mspro_sys_info *x_sys = x_attr->data;
         ssize_t rc = 0;
+        int date_tz = 0, date_tz_f = 0;
+
+        if (x_sys->assembly_date[0] > 0x80U) {
+                date_tz = (~x_sys->assembly_date[0]) + 1;
+                date_tz_f = date_tz & 3;
+                date_tz >>= 2;
+                date_tz = -date_tz;
+                date_tz_f *= 15;
+        } else if (x_sys->assembly_date[0] < 0x80U) {
+                date_tz = x_sys->assembly_date[0];
+                date_tz_f = date_tz & 3;
+                date_tz >>= 2;
+                date_tz_f *= 15;
+        }
 
         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "class: %x\n",
                         x_sys->class);
@@ -315,8 +329,8 @@ static ssize_t mspro_block_attr_show_sysinfo(struct device *dev,
         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "page size: %x\n",
                         be16_to_cpu(x_sys->page_size));
         rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly date: "
-                        "%d %04u-%02u-%02u %02u:%02u:%02u\n",
-                        x_sys->assembly_date[0],
+                        "GMT%+d:%d %04u-%02u-%02u %02u:%02u:%02u\n",
+                        date_tz, date_tz_f,
                         be16_to_cpu(*(unsigned short *)
                                     &x_sys->assembly_date[1]),
                         x_sys->assembly_date[3], x_sys->assembly_date[4],