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serial: 8250_exar: Use struct_size() helper 

One of the more common cases of allocation size calculations is finding
the size of a structure that has a zero-sized array at the end, along
with memory for some number of elements for that array.

Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20190721150135.82065-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2019-07-21 18:01:35 +03:00 committed by Greg Kroah-Hartman
parent 18b1345e60
commit df60a8af84
1 changed files with 1 additions and 3 deletions
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4
drivers/tty/serial/8250/8250_exar.c
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@ -478,9 +478,7 @@ exar_pci_probe(struct pci_dev *pcidev, const struct pci_device_id *ent)
nr_ports = board->num_ports ? board->num_ports : pcidev->device & 0x0f;
priv = devm_kzalloc(&pcidev->dev, sizeof(*priv) +
sizeof(unsigned int) * nr_ports,
GFP_KERNEL);
priv = devm_kzalloc(&pcidev->dev, struct_size(priv, line, nr_ports), GFP_KERNEL);
if (!priv)
return -ENOMEM;