From a8ee303cae6fbdaa639afa50b9d03ce6f0c7d7da Mon Sep 17 00:00:00 2001 From: Inaky Perez-Gonzalez Date: Thu, 8 Oct 2009 12:36:03 +0900 Subject: wimax/i2400m: SDIO: fix oops on reset when TXing on uninitialized data Currently the SDIO part of the TX resources were initialized/released with bus_dev_{start,stop}. The generic code's TX subsystem is destroyed afterwards, so there is a window from the bus-TX destruction to the generic-TX destruction where the generic-TX code might call into bus-TX to do transactions. The SDIO code cannot really cope with this (whereas in USB, how it is laid out, it correctly ignores it). In any case, it made no sense for the SDIO TX code to be in i2400m->bus_dev_start/stop(), so moved to i2400m->bus_setup/release(), which also takes care of the oops. Signed-off-by: Inaky Perez-Gonzalez --- drivers/net/wimax/i2400m/sdio.c | 43 +++++++++-------------------------------- 1 file changed, 9 insertions(+), 34 deletions(-) (limited to 'drivers/net/wimax/i2400m') diff --git a/drivers/net/wimax/i2400m/sdio.c b/drivers/net/wimax/i2400m/sdio.c index 14e66f06f235..ec178928914e 100644 --- a/drivers/net/wimax/i2400m/sdio.c +++ b/drivers/net/wimax/i2400m/sdio.c @@ -46,15 +46,6 @@ * i2400ms_bus_reset() Called by i2400m->bus_reset * __i2400ms_reset() * __i2400ms_send_barker() - * - * i2400ms_bus_dev_start() Called by i2400m_dev_start() [who is - * i2400ms_tx_setup() called by i2400m_setup()] - * i2400ms_rx_setup() - * - * i2400ms_bus_dev_stop() Called by i2400m_dev_stop() [who is - * i2400ms_rx_release() is called by i2400m_release()] - * i2400ms_tx_release() - * */ #include @@ -191,12 +182,17 @@ int i2400ms_bus_setup(struct i2400m *i2400m) goto error_func_enable; } + result = i2400ms_tx_setup(i2400ms); + if (result < 0) + goto error_tx_setup; result = i2400ms_rx_setup(i2400ms); if (result < 0) goto error_rx_setup; return 0; error_rx_setup: + i2400ms_tx_release(i2400ms); +error_tx_setup: sdio_claim_host(func); sdio_disable_func(func); sdio_release_host(func); @@ -218,6 +214,7 @@ void i2400ms_bus_release(struct i2400m *i2400m) struct sdio_func *func = i2400ms->func; i2400ms_rx_release(i2400ms); + i2400ms_tx_release(i2400ms); sdio_claim_host(func); sdio_disable_func(func); sdio_release_host(func); @@ -235,36 +232,14 @@ void i2400ms_bus_release(struct i2400m *i2400m) static int i2400ms_bus_dev_start(struct i2400m *i2400m) { - int result; struct i2400ms *i2400ms = container_of(i2400m, struct i2400ms, i2400m); struct sdio_func *func = i2400ms->func; struct device *dev = &func->dev; d_fnstart(3, dev, "(i2400m %p)\n", i2400m); msleep(200); - result = i2400ms_tx_setup(i2400ms); - if (result < 0) - goto error_tx_setup; - d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result); - return result; - -error_tx_setup: - i2400ms_tx_release(i2400ms); - d_fnend(3, dev, "(i2400m %p) = void\n", i2400m); - return result; -} - - -static -void i2400ms_bus_dev_stop(struct i2400m *i2400m) -{ - struct i2400ms *i2400ms = container_of(i2400m, struct i2400ms, i2400m); - struct sdio_func *func = i2400ms->func; - struct device *dev = &func->dev; - - d_fnstart(3, dev, "(i2400m %p)\n", i2400m); - i2400ms_tx_release(i2400ms); - d_fnend(3, dev, "(i2400m %p) = void\n", i2400m); + d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, 0); + return 0; } @@ -506,7 +481,7 @@ int i2400ms_probe(struct sdio_func *func, i2400m->bus_pl_size_max = I2400MS_PL_SIZE_MAX; i2400m->bus_setup = i2400ms_bus_setup; i2400m->bus_dev_start = i2400ms_bus_dev_start; - i2400m->bus_dev_stop = i2400ms_bus_dev_stop; + i2400m->bus_dev_stop = NULL; i2400m->bus_release = i2400ms_bus_release; i2400m->bus_tx_kick = i2400ms_bus_tx_kick; i2400m->bus_reset = i2400ms_bus_reset; -- cgit v1.2.2