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i40e: handle possible memory allocation failure

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The init_interrupt_scheme function had a possible failure
path to allocate memory that was found by smatch.

This adds the correct handling to the function to abort
probe if the memory allocation fails.

Change-ID: I2bf1d826a244209619da4c452d0d58b3eb5e26a3
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Jim Young <james.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Jesse Brandeburg 2015-04-07 19:45:39 -04:00 committed by Jeff Kirsher
parent 73b23402bb
commit c1147280d2
1 changed files with 11 additions and 3 deletions
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14
drivers/net/ethernet/intel/i40e/i40e_main.c
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@ -7301,7 +7301,7 @@ err_out:
* i40e_init_interrupt_scheme - Determine proper interrupt scheme
* @pf: board private structure to initialize
**/
static void i40e_init_interrupt_scheme(struct i40e_pf *pf)
static int i40e_init_interrupt_scheme(struct i40e_pf *pf)
{
int vectors = 0;
ssize_t size;
@ -7343,11 +7343,17 @@ static void i40e_init_interrupt_scheme(struct i40e_pf *pf)
/* set up vector assignment tracking */
size = sizeof(struct i40e_lump_tracking) + (sizeof(u16) * vectors);
pf->irq_pile = kzalloc(size, GFP_KERNEL);
if (!pf->irq_pile) {
dev_err(&pf->pdev->dev, "error allocating irq_pile memory\n");
return -ENOMEM;
}
pf->irq_pile->num_entries = vectors;
pf->irq_pile->search_hint = 0;
/* track first vector for misc interrupts */
/* track first vector for misc interrupts, ignore return */
(void)i40e_get_lump(pf, pf->irq_pile, 1, I40E_PILE_VALID_BIT - 1);
return 0;
}
/**
@ -9827,7 +9833,9 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
/* set up the main switch operations */
i40e_determine_queue_usage(pf);
i40e_init_interrupt_scheme(pf);
err = i40e_init_interrupt_scheme(pf);
if (err)
goto err_switch_setup;
/* The number of VSIs reported by the FW is the minimum guaranteed
* to us; HW supports far more and we share the remaining pool with