diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2018-05-15 06:40:21 +0300 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2018-06-12 07:05:23 +0300 |
| commit | c49e34401a32acc05bafec2b3d28d8e58410724c (patch) | |
| tree | c465d8e3f5384a97bff39d9e6e14513056dba68f /drivers/fsi/fsi-master-gpio.c | |
| parent | 4e56828a5db19e2de8f8dc464c6df2e7e9ff4e13 (diff) | |
| download | linux-c49e34401a32acc05bafec2b3d28d8e58410724c.tar.xz | |
fsi/fsi-master-gpio: More error handling cleanup
Remove calls to the empty and useless fsi_master_gpio_error()
function, and report CRC errors as "FSI_ERR_NO_SLAVE" when
reading an all 1's response.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Tested-by: Joel Stanley <joel@jms.id.au>
Diffstat (limited to 'drivers/fsi/fsi-master-gpio.c')
| -rw-r--r-- | drivers/fsi/fsi-master-gpio.c | 26 |
1 files changed, 5 insertions, 21 deletions
diff --git a/drivers/fsi/fsi-master-gpio.c b/drivers/fsi/fsi-master-gpio.c index 351c12f2ac55..da556da62846 100644 --- a/drivers/fsi/fsi-master-gpio.c +++ b/drivers/fsi/fsi-master-gpio.c @@ -41,13 +41,6 @@ #define FSI_GPIO_RESP_BUSY 1 /* Slave busy */ #define FSI_GPIO_RESP_ERRA 2 /* Any (misc) Error */ #define FSI_GPIO_RESP_ERRC 3 /* Slave reports master CRC error */ -#define FSI_GPIO_MTOE 4 /* Master time out error */ -#define FSI_GPIO_CRC_INVAL 5 /* Master reports slave CRC error */ - -/* Normal slave responses */ -#define FSI_GPIO_RESP_BUSY 1 -#define FSI_GPIO_RESP_ACK 0 -#define FSI_GPIO_RESP_ACKD 4 #define FSI_GPIO_MAX_BUSY 200 #define FSI_GPIO_MTOE_COUNT 1000 @@ -360,15 +353,6 @@ static void build_term_command(struct fsi_gpio_msg *cmd, uint8_t slave_id) } /* - * Store information on master errors so handler can detect and clean - * up the bus - */ -static void fsi_master_gpio_error(struct fsi_master_gpio *master, int error) -{ - -} - -/* * Note: callers rely specifically on this returning -EAGAIN for * a CRC error detected in the response. Use other error code * for other situations. It will be converted to something else @@ -396,7 +380,6 @@ static int read_one_response(struct fsi_master_gpio *master, if (i == FSI_GPIO_MTOE_COUNT) { dev_dbg(master->dev, "Master time out waiting for response\n"); - fsi_master_gpio_error(master, FSI_GPIO_MTOE); spin_unlock_irqrestore(&master->bit_lock, flags); return -ETIMEDOUT; } @@ -422,8 +405,11 @@ static int read_one_response(struct fsi_master_gpio *master, crc = crc4(0, 1, 1); crc = crc4(crc, msg.msg, msg.bits); if (crc) { - dev_dbg(master->dev, "ERR response CRC\n"); - fsi_master_gpio_error(master, FSI_GPIO_CRC_INVAL); + /* Check if it's all 1's, that probably means the host is off */ + if (((~msg.msg) & ((1ull << msg.bits) - 1)) == 0) + return -ENODEV; + dev_dbg(master->dev, "ERR response CRC msg: 0x%016llx (%d bits)\n", + msg.msg, msg.bits); return -EAGAIN; } @@ -538,12 +524,10 @@ retry: case FSI_GPIO_RESP_ERRA: dev_dbg(master->dev, "ERRA received: 0x%x\n", (int)response.msg); - fsi_master_gpio_error(master, response.msg); rc = -EIO; break; case FSI_GPIO_RESP_ERRC: dev_dbg(master->dev, "ERRC received: 0x%x\n", (int)response.msg); - fsi_master_gpio_error(master, response.msg); trace_fsi_master_gpio_crc_cmd_error(master); rc = -EAGAIN; break; |