1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
From 909840ef844013379e5ec399c1e76c65d1a6eb1d Mon Sep 17 00:00:00 2001
From: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Date: Sat, 12 Oct 2013 21:09:47 +0200
Subject: sf: fix out-of-order calls for spi_claim_bus and spi_release_bus
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
diff --git a/drivers/mtd/spi/sf_ops.c b/drivers/mtd/spi/sf_ops.c
index 108665f..d34747b 100644
--- a/drivers/mtd/spi/sf_ops.c
+++ b/drivers/mtd/spi/sf_ops.c
@@ -132,12 +132,6 @@ int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd,
if (buf == NULL)
timeout = SPI_FLASH_PAGE_ERASE_TIMEOUT;
- ret = spi_claim_bus(flash->spi);
- if (ret) {
- debug("SF: unable to claim SPI bus\n");
- return ret;
- }
-
ret = spi_flash_cmd_write_enable(flash);
if (ret < 0) {
debug("SF: enabling write failed\n");
@@ -158,8 +152,6 @@ int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd,
return ret;
}
- spi_release_bus(spi);
-
return ret;
}
@@ -175,12 +167,18 @@ int spi_flash_cmd_erase_ops(struct spi_flash *flash, u32 offset, size_t len)
return -1;
}
+ ret = spi_claim_bus(flash->spi);
+ if (ret) {
+ debug("SF: unable to claim SPI bus\n");
+ return ret;
+ }
+
cmd[0] = flash->erase_cmd;
while (len) {
#ifdef CONFIG_SPI_FLASH_BAR
ret = spi_flash_bank(flash, offset);
if (ret < 0)
- return ret;
+ goto done;
#endif
spi_flash_addr(offset, cmd);
@@ -190,13 +188,16 @@ int spi_flash_cmd_erase_ops(struct spi_flash *flash, u32 offset, size_t len)
ret = spi_flash_write_common(flash, cmd, sizeof(cmd), NULL, 0);
if (ret < 0) {
debug("SF: erase failed\n");
- break;
+ goto done;
}
offset += erase_size;
len -= erase_size;
}
+done:
+ spi_release_bus(flash->spi);
+
return ret;
}
@@ -208,6 +209,12 @@ int spi_flash_cmd_write_ops(struct spi_flash *flash, u32 offset,
u8 cmd[4];
int ret = -1;
+ ret = spi_claim_bus(flash->spi);
+ if (ret) {
+ debug("SF: unable to claim SPI bus\n");
+ return ret;
+ }
+
page_size = flash->page_size;
cmd[0] = CMD_PAGE_PROGRAM;
@@ -215,7 +222,7 @@ int spi_flash_cmd_write_ops(struct spi_flash *flash, u32 offset,
#ifdef CONFIG_SPI_FLASH_BAR
ret = spi_flash_bank(flash, offset);
if (ret < 0)
- return ret;
+ goto done;
#endif
byte_addr = offset % page_size;
chunk_len = min(len - actual, page_size - byte_addr);
@@ -232,12 +239,15 @@ int spi_flash_cmd_write_ops(struct spi_flash *flash, u32 offset,
buf + actual, chunk_len);
if (ret < 0) {
debug("SF: write failed\n");
- break;
+ goto done;
}
offset += chunk_len;
}
+done:
+ spi_release_bus(flash->spi);
+
return ret;
}
@@ -247,20 +257,12 @@ int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
struct spi_slave *spi = flash->spi;
int ret;
- ret = spi_claim_bus(flash->spi);
- if (ret) {
- debug("SF: unable to claim SPI bus\n");
- return ret;
- }
-
ret = spi_flash_cmd_read(spi, cmd, cmd_len, data, data_len);
if (ret < 0) {
debug("SF: read cmd failed\n");
return ret;
}
- spi_release_bus(spi);
-
return ret;
}
@@ -271,6 +273,12 @@ int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset,
u32 remain_len, read_len;
int ret = -1;
+ ret = spi_claim_bus(flash->spi);
+ if (ret) {
+ debug("SF: unable to claim SPI bus\n");
+ return ret;
+ }
+
/* Handle memory-mapped SPI */
if (flash->memory_map) {
spi_xfer(flash->spi, 0, NULL, NULL, SPI_XFER_MMAP);
@@ -289,7 +297,7 @@ int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset,
ret = spi_flash_cmd_bankaddr_write(flash, bank_sel);
if (ret) {
debug("SF: fail to set bank%d\n", bank_sel);
- return ret;
+ goto done;
}
#endif
remain_len = (SPI_FLASH_16MB_BOUN * (bank_sel + 1)) - offset;
@@ -304,7 +312,7 @@ int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset,
data, read_len);
if (ret < 0) {
debug("SF: read failed\n");
- break;
+ goto done;
}
offset += read_len;
@@ -312,6 +320,9 @@ int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset,
data += read_len;
}
+done:
+ spi_release_bus(flash->spi);
+
return ret;
}
--
1.8.3.2
|
