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wimax/i2400m: Ensure boot mode cmd and ack buffers are alloc'd before first message 

The change to the SDIO boot mode RX chain could try to use the cmd and
ack buffers befor they were allocated.  USB does not have the problem
but both were changed for consistency's sake.

Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
This commit is contained in:
Dirk Brandewie 2009-08-18 08:51:52 -07:00 committed by Inaky Perez-Gonzalez
parent 81b182a754
commit a134fd6b10
4 changed files with 64 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
drivers/net/wimax/i2400m/driver.c
View File

@ -618,6 +618,46 @@ int i2400m_dev_reset_handle(struct i2400m *i2400m)
EXPORT_SYMBOL_GPL(i2400m_dev_reset_handle);
/**
* i2400m_bm_buf_alloc - Alloc the command and ack buffers for boot mode
*
* Get the buffers needed to deal with boot mode messages. These
* buffers need to be allocated before the sdio recieve irq is setup.
*/
int i2400m_bm_buf_alloc(struct i2400m *i2400m)
{
int result;
result = -ENOMEM;
i2400m->bm_cmd_buf = kzalloc(I2400M_BM_CMD_BUF_SIZE, GFP_KERNEL);
if (i2400m->bm_cmd_buf == NULL)
goto error_bm_cmd_kzalloc;
i2400m->bm_ack_buf = kzalloc(I2400M_BM_ACK_BUF_SIZE, GFP_KERNEL);
if (i2400m->bm_ack_buf == NULL)
goto error_bm_ack_buf_kzalloc;
return 0;
error_bm_ack_buf_kzalloc:
kfree(i2400m->bm_cmd_buf);
error_bm_cmd_kzalloc:
return result;
}
EXPORT_SYMBOL_GPL(i2400m_bm_buf_alloc);
/**
* i2400m_bm_buf_free - Free boot mode command and ack buffers.
*
* Free the command and ack buffers
*
*/
void i2400m_bm_buf_free(struct i2400m *i2400m)
{
kfree(i2400m->bm_ack_buf);
kfree(i2400m->bm_cmd_buf);
return;
}
EXPORT_SYMBOL_GPL(i2400m_bm_buf_free
);
/**
* i2400m_setup - bus-generic setup function for the i2400m device
*
@ -645,16 +685,6 @@ int i2400m_setup(struct i2400m *i2400m, enum i2400m_bri bm_flags)
snprintf(wimax_dev->name, sizeof(wimax_dev->name),
"i2400m-%s:%s", dev->bus->name, dev_name(dev));
i2400m->bm_cmd_buf = kzalloc(I2400M_BM_CMD_BUF_SIZE, GFP_KERNEL);
if (i2400m->bm_cmd_buf == NULL) {
dev_err(dev, "cannot allocate USB command buffer\n");
goto error_bm_cmd_kzalloc;
}
i2400m->bm_ack_buf = kzalloc(I2400M_BM_ACK_BUF_SIZE, GFP_KERNEL);
if (i2400m->bm_ack_buf == NULL) {
dev_err(dev, "cannot allocate USB ack buffer\n");
goto error_bm_ack_buf_kzalloc;
}
result = i2400m_bootrom_init(i2400m, bm_flags);
if (result < 0) {
dev_err(dev, "read mac addr: bootrom init "
@ -713,10 +743,6 @@ int i2400m_setup(struct i2400m *i2400m, enum i2400m_bri bm_flags)
error_register_netdev:
error_read_mac_addr:
error_bootrom_init:
kfree(i2400m->bm_ack_buf);
error_bm_ack_buf_kzalloc:
kfree(i2400m->bm_cmd_buf);
error_bm_cmd_kzalloc:
d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result);
return result;
}

2
drivers/net/wimax/i2400m/i2400m.h
View File

@ -725,6 +725,8 @@ void i2400m_put(struct i2400m *i2400m)
}
extern int i2400m_dev_reset_handle(struct i2400m *);
extern int i2400m_bm_buf_alloc(struct i2400m *i2400m);
extern void i2400m_bm_buf_free(struct i2400m *i2400m);
/*
* _setup()/_release() are called by the probe/disconnect functions of

14
drivers/net/wimax/i2400m/sdio.c
View File

@ -451,6 +451,18 @@ int i2400ms_probe(struct sdio_func *func,
goto error_func_enable;
}
/*
* Before we are enabling the device interrupt register, make
* sure the buffer used during bootmode operation is setup so
* when the first D2H data interrupt comes, the memory is
* available for copying the D2H data.
*/
result = i2400m_bm_buf_alloc(i2400m);
if (result < 0) {
dev_err(dev, "cannot allocate SDIO bootmode buffer\n");
goto error_bootmode_buf_setup;
}
result = i2400ms_rx_setup(i2400ms);
if (result < 0)
goto error_rx_setup;
@ -474,6 +486,8 @@ int i2400ms_probe(struct sdio_func *func,
error_setup:
i2400ms_rx_release(i2400ms);
error_rx_setup:
i2400m_bm_buf_free(i2400m);
error_bootmode_buf_setup:
sdio_claim_host(func);
sdio_disable_func(func);
sdio_release_host(func);

8
drivers/net/wimax/i2400m/usb.c
View File

@ -419,6 +419,12 @@ int i2400mu_probe(struct usb_interface *iface,
usb_dev->autosuspend_disabled = 0;
#endif
result = i2400m_bm_buf_alloc(i2400m);
if (result < 0) {
dev_err(dev, "cannot allocate USB bootmode buffer\n");
goto error_bm_buf_alloc;
}
result = i2400m_setup(i2400m, I2400M_BRI_MAC_REINIT);
if (result < 0) {
dev_err(dev, "cannot setup device: %d\n", result);
@ -434,6 +440,8 @@ int i2400mu_probe(struct usb_interface *iface,
error_debugfs_add:
i2400m_release(i2400m);
error_setup:
i2400m_bm_buf_free(i2400m);
error_bm_buf_alloc:
usb_set_intfdata(iface, NULL);
usb_put_dev(i2400mu->usb_dev);
free_netdev(net_dev);