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qcacld-3.0: Retry if request_firmware returns EAGAIN

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Loading driver is fail because request_firmware returns
EAGAIN when it invokes usermodehelper_read_trylock during
system suspend happens. Though system suspend is aborted,
it hasn't invoked usermodehelper_enable yet.

To resolve this issue, retry again to check whether
usermodehelper_enable has done.

Change-Id: I80f95c2194039a67adbc463a32bfc0a15e68484b
CRs-Fixed: 2251604
This commit is contained in:
Paul Zhang 2018-06-01 11:14:57 +08:00 • committed by nshrivas
commit 8bbbcdf465
2 changed files with 16 additions and 2 deletions
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3
core/hdd/inc/wlan_hdd_main.h
View file

@ -346,6 +346,9 @@ static inline bool in_compat_syscall(void) { return is_compat_task(); }
#define HDD_MOD_EXIT_SSR_MAX_RETRIES 75
#endif
#define HDD_CFG_REQUEST_FIRMWARE_RETRIES (3)
#define HDD_CFG_REQUEST_FIRMWARE_DELAY (20)
#define MAX_USER_COMMAND_SIZE 4096
#define DNS_DOMAIN_NAME_MAX_LEN 255
#define ICMPv6_ADDR_LEN 16

15
core/hdd/src/wlan_hdd_cfg.c
View file

@ -7520,7 +7520,9 @@ static void hdd_set_rx_mode_value(struct hdd_context *hdd_ctx)
*/
QDF_STATUS hdd_parse_config_ini(struct hdd_context *hdd_ctx)
{
int status, i = 0;
int status = 0;
int i = 0;
int retry = 0;
/** Pointer for firmware image data */
const struct firmware *fw = NULL;
char *buffer, *line, *pTemp = NULL;
@ -7532,7 +7534,16 @@ QDF_STATUS hdd_parse_config_ini(struct hdd_context *hdd_ctx)
memset(cfgIniTable, 0, sizeof(cfgIniTable));
status = request_firmware(&fw, WLAN_INI_FILE, hdd_ctx->parent_dev);
do {
if (status == -EAGAIN)
msleep(HDD_CFG_REQUEST_FIRMWARE_DELAY);
status = request_firmware(&fw, WLAN_INI_FILE,
hdd_ctx->parent_dev);
retry++;
} while ((retry < HDD_CFG_REQUEST_FIRMWARE_RETRIES) &&
(status == -EAGAIN));
if (status) {
hdd_alert("request_firmware failed %d", status);