[PATCH] commands: spi: Fix spi read procedure

[Alexander Shiyan]

Buffer for RX is set incorrectly.

barebox at Phytec phyCORE-i.MX27:/  spi -r 128 -v
device config
    bus_num       = 0
    max_speed_hz  = 1000000
    chip_select   = 0
    mode          = 0x0
    bits_per_word = 8

wrote 0 bytes
00000000:
read 128 bytes
00000000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
00000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
00000020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
00000030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
00000040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
00000050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
00000060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
00000070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
unable to handle paging request at address 0x4dffd3d0
pc : [<a7f05ec4>]    lr : [<a7f05ebc>]
sp : a7fff890  ip : a7fff860  fp : a7f68820
r10: a6ffe9bc  r9 : 00000000  r8 : 00000001
r7 : a6ffe9ec  r6 : a6f00000  r5 : a6ffe9ec  r4 : a6ffe9e4
r3 : a6ffe9e4  r2 : a6ffe9e5  r1 : a6ffe9e4  r0 : 4dffd3cc
Flags: nZCv  IRQs off  FIQs off  Mode SVC_32
...

Signed-off-by: Alexander Shiyan <shc_work at mail.ru>
---
 commands/spi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/commands/spi.c b/commands/spi.c
index 2f6b430..79fc539 100644
--- a/commands/spi.c
+++ b/commands/spi.c
@@ -81,7 +81,7 @@ static int do_spi(int argc, char *argv[])
 	}
 
 	tx_buf = xmalloc(count);
-	rx_buf = xmalloc(count);
+	rx_buf = xmalloc(read);
 
 	for (i = 0; i < count; i++)
 		tx_buf[i] = (u8) simple_strtol(argv[optind + i], NULL, 16);
-- 
1.8.1.5