Fix TX queue overflow, improve PHY initialization and cleanup in bdx driver #80
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the nr_frags variable after adding a fragment for short packets (<60 bytes). This fix increments nr_frags accordingly to keep tx_level consistant, preventing overflow warnings. The pci_free_irq_vectors() function does not free individual IRQs and leaves procfs entries behind causing wanrings about non-empty directories.Consequently, free_irq() has been added so that driver removal does not complaint.
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This PR addresses several issues and improvements in the bdx driver:
Fix TX queue overflow
Correct handling of nr_frags in bdx_tx_transmit() to properly account for additional fragments added for short packets (< 60 bytes), preventing priv->tx_level overflow warnings.
Fix PHY initialization
Corrected the bdx_phy_init() function to detect and register PHY devices with MDIO bus different from 1.
Fix driver removal warning about IRQ
Fixed IRQ cleanup routines to prevent warning during driver unload.
These changes increase driver stability and hardware compatibility, especially for PHY handling and TX packet transmission with short packets.