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sfc: Clear I2C adapter structure in falcon_remove_nic() 

i2c_del_adapter() leaves dangling pointers in the structure.  If we
retry the NIC probe and pass the structure to i2c_add_adapter() again
it will lead to an oops unless we clear it first.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ben Hutchings 2009-03-04 09:53:02 +00:00 committed by David S. Miller
parent 115122afc5
commit 8c870379d2
1 changed files with 2 additions and 0 deletions
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2
drivers/net/sfc/falcon.c
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@ -3114,8 +3114,10 @@ void falcon_remove_nic(struct efx_nic *efx)
struct falcon_nic_data *nic_data = efx->nic_data;
int rc;
/* Remove I2C adapter and clear it in preparation for a retry */
rc = i2c_del_adapter(&efx->i2c_adap);
BUG_ON(rc);
memset(&efx->i2c_adap, 0, sizeof(efx->i2c_adap));
falcon_remove_spi_devices(efx);
falcon_free_buffer(efx, &efx->irq_status);